(* The Average Hours Worked each Week by Workers in U.S.:Jan.64 - Feb.97  *)



cols={year,month,"average hours"};

hours=

{

{1964, 1 , 38.1},

{1964, 2 , 38.4},

{1964, 3 , 38.5},

{1964, 4 , 38.5},

{1964, 5 , 38.7},

{1964, 6 , 38.9},

{1964, 7 , 39.0},

{1964, 8 , 39.1},

{1964, 9 , 38.6},

{1964, 10, 38.8},

{1964, 11, 38.6},

{1964, 12, 39.0},

{1965, 1 , 38.5},

{1965, 2 , 38.5},

{1965, 3 , 38.7},

{1965, 4 , 38.5},

{1965, 5 , 38.8},

{1965, 6 , 38.9},

{1965, 7 , 39.0},

{1965, 8 , 39.1},

{1965, 9 , 38.7},

{1965, 10, 38.8},

{1965, 11, 38.6},

{1965, 12, 38.9},

{1966, 1 , 38.4},

{1966, 2 , 38.6},

{1966, 3 , 38.6},

{1966, 4 , 38.4},

{1966, 5 , 38.5},

{1966, 6 , 38.8},

{1966, 7 , 38.9},

{1966, 8 , 39.0},

{1966, 9 , 38.6},

{1966, 10, 38.6},

{1966, 11, 38.3},

{1966, 12, 38.5},

{1967, 1 , 38.1},

{1967, 2 , 37.7},

{1967, 3 , 37.9},

{1967, 4 , 37.7},

{1967, 5 , 37.8},

{1967, 6 , 38.2},

{1967, 7 , 38.3},

{1967, 8 , 38.4},

{1967, 9 , 38.2},

{1967, 10, 38.0},

{1967, 11, 37.9},

{1967, 12, 38.0},

{1968, 1 , 37.4},

{1968, 2 , 37.6},

{1968, 3 , 37.6},

{1968, 4 , 37.4},

{1968, 5 , 37.7},

{1968, 6 , 38.1},

{1968, 7 , 38.2},

{1968, 8 , 38.3},

{1968, 9 , 38.1},

{1968, 10, 37.9},

{1968, 11, 37.5},

{1968, 12, 37.8},

{1969, 1 , 37.5},

{1969, 2 , 37.2},

{1969, 3 , 37.6},

{1969, 4 , 37.5},

{1969, 5 , 37.6},

{1969, 6 , 37.9},

{1969, 7 , 38.1},

{1969, 8 , 38.2},

{1969, 9 , 37.9},

{1969, 10, 37.6},

{1969, 11, 37.5},

{1969, 12, 37.7},

{1970, 1 , 37.1},

{1970, 2 , 37.0},

{1970, 3 , 37.1},

{1970, 4 , 36.9},

{1970, 5 , 37.0},

{1970, 6 , 37.3},

{1970, 7 , 37.6},

{1970, 8 , 37.6},

{1970, 9 , 37.0},

{1970, 10, 36.9},

{1970, 11, 36.8},

{1970, 12, 37.0},

{1971, 1 , 36.5},

{1971, 2 , 36.5},

{1971, 3 , 36.7},

{1971, 4 , 36.6},

{1971, 5 , 36.7},

{1971, 6 , 37.2},

{1971, 7 , 37.2},

{1971, 8 , 37.4},

{1971, 9 , 36.9},

{1971, 10, 37.0},

{1971, 11, 36.9},

{1971, 12, 37.2},

{1972, 1 , 36.5},

{1972, 2 , 36.6},

{1972, 3 , 36.8},

{1972, 4 , 36.8},

{1972, 5 , 36.8},

{1972, 6 , 37.2},

{1972, 7 , 37.3},

{1972, 8 , 37.4},

{1972, 9 , 37.2},

{1972, 10, 37.1},

{1972, 11, 36.9},

{1972, 12, 37.0},

{1973, 1 , 36.4},

{1973, 2 , 36.6},

{1973, 3 , 36.8},

{1973, 4 , 36.8},

{1973, 5 , 36.9},

{1973, 6 , 37.3},

{1973, 7 , 37.4},

{1973, 8 , 37.4},

{1973, 9 , 37.1},

{1973, 10, 36.8},

{1973, 11, 36.9},

{1973, 12, 37.0},

{1974, 1 , 36.3},

{1974, 2 , 36.4},

{1974, 3 , 36.5},

{1974, 4 , 36.2},

{1974, 5 , 36.5},

{1974, 6 , 36.9},

{1974, 7 , 37.0},

{1974, 8 , 37.0},

{1974, 9 , 36.7},

{1974, 10, 36.5},

{1974, 11, 36.1},

{1974, 12, 36.3},

{1975, 1 , 35.7},

{1975, 2 , 35.6},

{1975, 3 , 35.6},

{1975, 4 , 35.7},

{1975, 5 , 35.8},

{1975, 6 , 36.2},

{1975, 7 , 36.4},

{1975, 8 , 36.6},

{1975, 9 , 36.3},

{1975, 10, 36.2},

{1975, 11, 36.1},

{1975, 12, 36.5},

{1976, 1 , 36.0},

{1976, 2 , 36.0},

{1976, 3 , 35.9},

{1976, 4 , 35.8},

{1976, 5 , 36.1},

{1976, 6 , 36.4},

{1976, 7 , 36.5},

{1976, 8 , 36.4},

{1976, 9 , 36.0},

{1976, 10, 36.0},

{1976, 11, 35.9},

{1976, 12, 36.2},

{1977, 1 , 35.3},

{1977, 2 , 35.8},

{1977, 3 , 35.8},

{1977, 4 , 35.8},

{1977, 5 , 35.9},

{1977, 6 , 36.3},

{1977, 7 , 36.4},

{1977, 8 , 36.3},

{1977, 9 , 36.1},

{1977, 10, 36.1},

{1977, 11, 35.9},

{1977, 12, 36.2},

{1978, 1 , 35.1},

{1978, 2 , 35.3},

{1978, 3 , 35.8},

{1978, 4 , 35.8},

{1978, 5 , 35.7},

{1978, 6 , 36.2},

{1978, 7 , 36.3},

{1978, 8 , 36.2},

{1978, 9 , 35.9},

{1978, 10, 35.9},

{1978, 11, 35.8},

{1978, 12, 36.1},

{1979, 1 , 35.3},

{1979, 2 , 35.4},

{1979, 3 , 35.7},

{1979, 4 , 35.1},

{1979, 5 , 35.5},

{1979, 6 , 35.9},

{1979, 7 , 36.0},

{1979, 8 , 36.0},

{1979, 9 , 35.8},

{1979, 10, 35.7},

{1979, 11, 35.6},

{1979, 12, 35.9},

{1980, 1 , 35.1},

{1980, 2 , 35.1},

{1980, 3 , 35.2},

{1980, 4 , 35.1},

{1980, 5 , 35.0},

{1980, 6 , 35.3},

{1980, 7 , 35.3},

{1980, 8 , 35.5},

{1980, 9 , 35.3},

{1980, 10, 35.3},

{1980, 11, 35.3},

{1980, 12, 35.6},

{1981, 1 , 35.1},

{1981, 2 , 35.0},

{1981, 3 , 35.2},

{1981, 4 , 35.2},

{1981, 5 , 35.2},

{1981, 6 , 35.4},

{1981, 7 , 35.6},

{1981, 8 , 35.6},

{1981, 9 , 35.1},

{1981, 10, 35.2},

{1981, 11, 35.1},

{1981, 12, 35.2},

{1982, 1 , 33.9},

{1982, 2 , 34.8},

{1982, 3 , 34.8},

{1982, 4 , 34.6},

{1982, 5 , 34.8},

{1982, 6 , 35.0},

{1982, 7 , 35.2},

{1982, 8 , 35.2},

{1982, 9 , 34.8},

{1982, 10, 34.7},

{1982, 11, 34.7},

{1982, 12, 35.0},

{1983, 1 , 34.6},

{1983, 2 , 34.2},

{1983, 3 , 34.6},

{1983, 4 , 34.7},

{1983, 5 , 34.9},

{1983, 6 , 35.2},

{1983, 7 , 35.3},

{1983, 8 , 35.3},

{1983, 9 , 35.2},

{1983, 10, 35.2},

{1983, 11, 35.1},

{1983, 12, 35.4},

{1984, 1 , 34.9},

{1984, 2 , 34.9},

{1984, 3 , 35.0},

{1984, 4 , 35.2},

{1984, 5 , 35.1},

{1984, 6 , 35.4},

{1984, 7 , 35.5},

{1984, 8 , 35.4},

{1984, 9 , 35.3},

{1984, 10, 35.0},

{1984, 11, 35.0},

{1984, 12, 35.4},

{1985, 1 , 34.6},

{1985, 2 , 34.5},

{1985, 3 , 34.8},

{1985, 4 , 34.7},

{1985, 5 , 34.9},

{1985, 6 , 35.2},

{1985, 7 , 35.1},

{1985, 8 , 35.2},

{1985, 9 , 35.0},

{1985, 10, 34.9},

{1985, 11, 34.8},

{1985, 12, 35.2},

{1986, 1 , 34.7},

{1986, 2 , 34.4},

{1986, 3 , 34.7},

{1986, 4 , 34.6},

{1986, 5 , 34.7},

{1986, 6 , 34.9},

{1986, 7 , 34.9},

{1986, 8 , 35.1},

{1986, 9 , 34.8},

{1986, 10, 34.7},

{1986, 11, 34.7},

{1986, 12, 34.8},

{1987, 1 , 34.4},

{1987, 2 , 34.5},

{1987, 3 , 34.6},

{1987, 4 , 34.5},

{1987, 5 , 34.8},

{1987, 6 , 35.0},

{1987, 7 , 35.0},

{1987, 8 , 35.2},

{1987, 9 , 34.7},

{1987, 10, 34.9},

{1987, 11, 34.8},

{1987, 12, 34.8},

{1988, 1 , 34.3},

{1988, 2 , 34.4},

{1988, 3 , 34.4},

{1988, 4 , 34.7},

{1988, 5 , 34.6},

{1988, 6 , 34.9},

{1988, 7 , 35.1},

{1988, 8 , 34.9},

{1988, 9 , 34.7},

{1988, 10, 34.9},

{1988, 11, 34.6},

{1988, 12, 34.8},

{1989, 1 , 34.4},

{1989, 2 , 34.2},

{1989, 3 , 34.4},

{1989, 4 , 34.7},

{1989, 5 , 34.4},

{1989, 6 , 34.7},

{1989, 7 , 35.0},

{1989, 8 , 34.9},

{1989, 9 , 34.6},

{1989, 10, 34.7},

{1989, 11, 34.4},

{1989, 12, 34.6},

{1990, 1 , 34.1},

{1990, 2 , 34.2},

{1990, 3 , 34.3},

{1990, 4 , 34.3},

{1990, 5 , 34.4},

{1990, 6 , 34.8},

{1990, 7 , 34.9},

{1990, 8 , 34.8},

{1990, 9 , 34.7},

{1990, 10, 34.3},

{1990, 11, 34.3},

{1990, 12, 34.7},

{1991, 1 , 33.7},

{1991, 2 , 33.9},

{1991, 3 , 33.9},

{1991, 4 , 34.0},

{1991, 5 , 34.1},

{1991, 6 , 34.7},

{1991, 7 , 34.5},

{1991, 8 , 34.7},

{1991, 9 , 34.6},

{1991, 10, 34.4},

{1991, 11, 34.3},

{1991, 12, 34.6},

{1992, 1 , 33.8},

{1992, 2 , 34.2},

{1992, 3 , 34.2},

{1992, 4 , 34.1},

{1992, 5 , 34.4},

{1992, 6 , 34.5},

{1992, 7 , 34.6},

{1992, 8 , 34.9},

{1992, 9 , 34.3},

{1992, 10, 34.4},

{1992, 11, 34.5},

{1992, 12, 34.5},

{1993, 1 , 34.0},

{1993, 2 , 34.1},

{1993, 3 , 34.0},

{1993, 4 , 34.2},

{1993, 5 , 34.7},

{1993, 6 , 34.6},

{1993, 7 , 34.8},

{1993, 8 , 35.1},

{1993, 9 , 34.5},

{1993, 10, 34.6},

{1993, 11, 34.5},

{1993, 12, 34.7},

{1994, 1 , 34.4},

{1994, 2 , 34.0},

{1994, 3 , 34.4},

{1994, 4 , 34.5},

{1994, 5 , 34.8},

{1994, 6 , 34.8},

{1994, 7 , 34.9},

{1994, 8 , 35.0},

{1994, 9 , 34.8},

{1994, 10, 35.0},

{1994, 11, 34.6},

{1994, 12, 34.8},

{1995, 1 , 34.4},

{1995, 2 , 34.2},

{1995, 3 , 34.2},

{1995, 4 , 34.3},

{1995, 5 , 34.2},

{1995, 6 , 34.6},

{1995, 7 , 34.8},

{1995, 8 , 34.8},

{1995, 9 , 34.6},

{1995, 10, 34.7},

{1995, 11, 34.4},

{1995, 12, 34.5},

{1996, 1 , 33.4},

{1996, 2 , 34.1},

{1996, 3 , 34.2},

{1996, 4 , 34.1},

{1996, 5 , 34.3},

{1996, 6 , 34.9},

{1996, 7 , 34.6},

{1996, 8 , 34.8},

{1996, 9 , 34.9},

{1996, 10, 34.5},

{1996, 11, 34.5},

{1996, 12, 34.9},

{1997, 1 , 33.9},

{1997, 2 , 34.5}};