YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.5422 0.2333 0.0228 0.9554 18.10 1930. 171. 0.5852 0.1998 0.0153 0.9657 19.95 1940. 190. 0.6150 0.1626 0.0118 0.9696 20.00 1950. 190. 0.5701 0.1917 0.0139 0.9637 20.00 1960. 190. 0.5914 0.1466 0.0106 0.9666 20.00 1970. 190. 0.4603 0.2621 0.0190 0.9446 20.00 1980. 190. 0.4057 0.2614 0.0190 0.9318 20.00