YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.4929 0.1906 0.0186 0.9462 18.10 1930. 171. 0.6393 0.1360 0.0104 0.9725 19.95 1940. 190. 0.6933 0.1188 0.0086 0.9784 20.00 1950. 190. 0.5786 0.1599 0.0116 0.9649 20.00 1960. 190. 0.5490 0.1547 0.0112 0.9605 20.00 1970. 190. 0.4610 0.2599 0.0189 0.9448 20.00 1980. 190. 0.4414 0.2451 0.0178 0.9405 20.00