"Year","Mean (left scale)","Core sample","All industries","4*minimum threshold","Covered workers (right scale)","Core sample","All industries","4*minimum threshold"
1937,201070,201070,173220,15.71963,15.71963,17.88759
1938,194790,194790,165980,14.96144,14.96144,17.18174
1939,204040,204040,174350,15.80638,15.80638,18.1134
1940,217870,217870,187560,16.58520,16.58520,18.88561
1941,239740,239740,206280,17.88626,17.88626,20.37628
1942,269160,269160,225730,18.09526,18.09526,21.05857
1943,279260,279260,238060,20.11514,20.11514,23.08327
1944,271360,271360,233100,21.19491,21.19491,24.15636
1945,275020,275020,229550,19.61957,19.61957,22.87655
1946,293150,293150,247140,18.74636,18.74636,21.65341
1947,298380,298380,255900,18.74558,18.74558,21.35306
1948,299920,299920,260320,19.05947,19.05947,21.50049
1949,294510,294510,255780,19.53324,19.53324,22.02872
1950,308600,308600,267410,20.07611,20.07611,22.67972
1951,333650,346910,294290,20.99863,20.69181,23.37337
1952,339820,357180,300390,21.85106,21.44774,24.28061
1953,345770,366600,307680,23.09487,22.57310,25.51754
1954,341230,364230,301210,23.00792,22.45692,25.59522
1955,350180,383330,307270,24.25816,23.47446,27.1382
1956,355630,397560,315200,25.51849,24.60713,28.30000
1957,352512,411664,311290,25.49127,24.29744,28.35808
1958,344996,409096,302630,25.01617,23.86341,27.98012
1959,350273,418061,309454,26.60781,25.34806,29.58709
1960,353146,424706,313552,27.42849,26.01619,30.37624
1961,351403,426425,310875,27.73437,26.36674,30.81370
1962,357075,435211,317120,28.84612,27.38863,31.94408
1963,360506,441604,319948,29.50365,27.99799,32.69166
1964,366080,449241,325482,30.49921,29.01032,33.74214
1965,374661,460253,333550,31.2265,29.75415,34.50848
1966,386680,475080,344381,32.27081,30.73397,35.66088
1967,394988,487775,352178,32.62634,31.17405,36.01569
1968,403558,499735,360187,33.47341,32.02873,36.91739
1969,413203,511773,368068,34.00298,32.58719,37.56718
1970,412894,514380,367075,33.76313,32.54337,37.35376
1971,411846,516640,364932,34.00719,32.85165,37.72769
1972,420483,528820,371644,35.54296,34.29543,39.52758
1973,432372,543740,382405,36.02546,34.64541,40.05291
1974,438624,554545,387672,34.67538,33.3018,38.5718
1975,431548,553707,378702,33.87649,32.50030,37.91607
1976,442795,568598,388741,34.66602,33.11308,38.78629
1977,458003,588179,403183,35.34024,33.61593,39.46011
1978,475975,608905,424173,36.38949,34.23322,40.21083
1979,494841,630345,442442,35.78083,33.62986,39.42126
1980,501293,643017,446679,35.03944,32.90249,38.7166
1981,510852,653874,454541,34.82302,32.85931,38.52393
1982,517260,657065,456623,34.54392,32.91450,38.47177
1983,524695,667052,461906,34.81968,33.18116,38.87677
1984,546169,692515,481162,35.61108,33.88192,39.74252
1985,566790,717343,498526,35.86193,34.26651,40.07299
1986,581006,735828,510174,36.725,35.14019,41.09714
1987,589393,757504,518407,37.60268,35.79125,42.02792
1988,610709,786057,536680,38.10022,36.24974,42.61603
1989,627489,809124,552234,37.73207,36.02042,42.1477
1990,638214,826131,562235,37.30986,35.70386,41.6291
1991,638601,831721,560679,36.55110,35.17005,40.88713
1992,642188,839215,562827,37.65357,36.12371,42.19585
1993,653193,853002,572312,37.40582,35.97499,41.91831
1994,670384,874251,588757,37.61639,36.20443,42.06833
1995,689782,894567,606264,38.05791,36.64542,42.53434
1996,707392,912993,622736,38.69736,37.17813,43.19528
1997,726092,932063,640651,40.28941,38.5582,44.89263
1998,740660,949032,656090,42.01568,40.1106,46.65871
1999,753329,962804,667444,43.37695,41.30298,48.16553
2000,764291,975194,677529,44.5996,42.34671,49.50301
2001,763802,977507,676078,44.22127,42.19114,49.14401
2002,752867,970679,663607,43.45226,41.6797,48.45107
2003,744440,967254,654453,43.67289,41.88322,48.81449
2004,759709,978742,663263,44.05227,42.39444,49.52786