"Year","Mean (left scale)","Median (left scale)","Covered workers (right scale)"
1937,15.71963,12.60409,201070
1938,14.96144,11.80969,194790
1939,15.80638,12.80356,204040
1940,16.58520,13.2997,217870
1941,17.88626,14.38500,239740
1942,18.09526,14.76554,269160
1943,20.11514,17.13732,279260
1944,21.19491,18.71644,271360
1945,19.61957,17.23065,275020
1946,18.74636,16.34607,293150
1947,18.74558,16.71847,298380
1948,19.05947,17.17249,299920
1949,19.53324,17.46435,294510
1950,20.07611,18.28132,308600
1951,20.99863,18.87696,333650
1952,21.85106,19.92296,339820
1953,23.09487,21.19960,345770
1954,23.00792,21.05549,341230
1955,24.25816,22.18303,350180
1956,25.51849,23.22067,355630
1957,25.49127,22.98834,352512
1958,25.01617,22.40769,344996
1959,26.60781,23.92091,350273
1960,27.42849,24.52917,353146
1961,27.73437,24.81024,351403
1962,28.84612,25.73993,357075
1963,29.50365,26.28472,360506
1964,30.49921,27.00379,366080
1965,31.2265,27.63656,374661
1966,32.27081,28.49423,386680
1967,32.62634,28.67319,394988
1968,33.47341,29.35185,403558
1969,34.00298,29.77242,413203
1970,33.76313,29.31755,412894
1971,34.00719,29.55815,411846
1972,35.54296,30.47078,420483
1973,36.02546,30.81339,432372
1974,34.67538,29.5321,438624
1975,33.87649,28.56283,431548
1976,34.66602,29.22901,442795
1977,35.34024,29.38291,458003
1978,36.38949,29.85264,475975
1979,35.78083,29.49847,494841
1980,35.03944,28.54614,501293
1981,34.82302,28.31284,510852
1982,34.54392,27.65388,517260
1983,34.81968,27.70279,524695
1984,35.61108,28.17471,546169
1985,35.86193,28.25147,566790
1986,36.725,28.69014,581006
1987,37.60268,28.90586,589393
1988,38.10022,28.81548,610709
1989,37.73207,28.59800,627489
1990,37.30986,28.19789,638214
1991,36.55110,27.69323,638601
1992,37.65357,28.00632,642188
1993,37.40582,27.78379,653193
1994,37.61639,27.97856,670384
1995,38.05791,28.09551,689782
1996,38.69736,28.40199,707392
1997,40.28941,29.15401,726092
1998,42.01568,30.25756,740660
1999,43.37695,30.90097,753329
2000,44.5996,31.39574,764291
2001,44.22127,31.43062,763802
2002,43.45226,31.38044,752867
2003,43.67289,31.32477,744440
2004,44.05227,31.245,759709