"Year","Mean (left scale)","Median (left scale)","Covered workers (right scale)"
1937,14.96761,11.65599,273950
1938,14.35440,10.87448,260310
1939,15.13574,11.64248,277710
1940,15.78864,12.13324,298850
1941,17.00043,13.03178,335310
1942,17.51385,13.47738,375240
1943,19.62855,15.78515,375750
1944,20.94219,17.46783,360080
1945,19.36858,16.33912,366300
1946,18.33560,15.38755,399750
1947,18.42673,15.82956,410280
1948,18.75541,16.35772,412260
1949,19.31307,16.85129,399760
1950,19.97683,17.55262,416040
1951,20.96515,18.21022,440520
1952,21.87171,19.27175,442730
1953,23.16969,20.58162,445670
1954,23.28783,20.68261,434690
1955,24.44508,21.57681,448640
1956,25.52593,22.3916,460210
1957,25.34761,21.98927,459853
1958,24.86102,21.39843,447403
1959,26.27441,22.75919,458757
1960,27.01166,23.23001,464748
1961,27.20372,23.28421,463879
1962,28.14837,23.96207,473771
1963,28.75967,24.45693,480724
1964,29.55157,25.09404,493199
1965,29.98223,25.43574,513699
1966,30.74528,25.77874,536684
1967,31.16321,26.08838,546991
1968,31.79827,26.46010,562625
1969,32.10908,26.57392,582983
1970,31.78862,26.227,584486
1971,31.90752,26.22271,583268
1972,33.12352,26.80101,599187
1973,33.36929,26.82358,624276
1974,32.21724,25.80611,631314
1975,31.57558,24.98118,615202
1976,32.14828,25.32514,635596
1977,32.71208,25.35042,658996
1978,33.61137,25.81999,687321
1979,32.72309,25.37761,711935
1980,31.55247,24.24939,710382
1981,31.19382,23.88771,717209
1982,31.07563,23.49748,714080
1983,31.61835,23.65526,718824
1984,32.24536,23.94618,746121
1985,32.55882,24.11316,767219
1986,33.47017,24.66646,777678
1987,34.22849,24.93197,782343
1988,34.61312,24.83680,807025
1989,34.21232,24.59587,822782
1990,33.85799,24.33394,828285
1991,33.1303,23.86538,818843
1992,33.97318,24.05162,818277
1993,33.58685,23.73440,829332
1994,33.64617,23.85244,848251
1995,33.99466,23.94104,868042
1996,34.52021,24.20121,886237
1997,35.86492,24.8156,909761
1998,37.28999,25.7496,930635
1999,38.3745,26.23726,948971
2000,39.39960,26.72023,964814
2001,39.17695,26.81066,961637
2002,38.56411,26.77559,946002
2003,38.7866,26.70688,936949
2004,39.1756,26.553,959656