YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.5300 0.2330 0.0227 0.9533 18.10 1930. 171. 0.6129 0.1623 0.0124 0.9693 19.95 1940. 190. 0.6289 0.1514 0.0110 0.9713 20.00 1950. 190. 0.5800 0.1850 0.0134 0.9651 20.00 1960. 190. 0.6033 0.1413 0.0103 0.9682 20.00 1970. 190. 0.4857 0.2517 0.0183 0.9497 20.00 1980. 190. 0.4603 0.2363 0.0171 0.9446 20.00