Historical Statistics of the United States Millennial Edition Online

		Ba4575
		Average weekly hours
Row	Year	Hours
1	1900	58.5
2	1901	58.4
3	1902	58.1
4	1903	57.9
5	1904	57.1

6	1905	57.2
7	1906	57.0
8	1907	56.9
9	1908	55.6
10	1909	55.7

11	1910	55.6
12	1911	55.4
13	1912	55.3
14	1913	55.0
15	1914	54.0

16	1915	53.4
17	1916	53.8
18	1917	53.4
19	1918	52.4
20	1919	50.0

21	1920	50.6
22	1921	48.4
23	1922	48.9
24	1923	49.6
25	1924	48.8

26	1925	49.0
27	1926	49.3
28	1927	49.1
29	1928	48.8
30	1929	48.7

31	1930	47.1
32	1931	45.6
33	1932	43.7
34	1933	43.3
35	1934	40.6

36	1935	41.7
37	1936	43.4
38	1937	43.1
39	1938	41.6
40	1939	42.1

41	1940	42.5
42	1941	43.3
43	1942	44.3
44	1943	46.8
45	1944	46.9

46	1945	45.6
47	1946	43.3
48	1947	42.4
49	1948	41.7
50	1949	41.0

51	1950	41.1
52	1951	41.7
53	1952	42.0
54	1953	41.5
55	1954	40.4

56	1955	41.6
57	1956	41.9
58	1957	41.2
59	1958	40.9
60	1959	40.8

61	1960	41.0
62	1961	41.2
63	1962	41.7
64	1966	42.1
65	1969	42.0

66	1972	41.4
67	1975	40.8
68	1976	40.9
69	1977	41.3
70	1978	41.3

71	1981	40.8
72	1984	41.2
73	1986	41.6