YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.4599 0.2391 0.0233 0.9391 18.10 1930. 171. 0.5702 0.1601 0.0122 0.9636 19.95 1940. 190. 0.5447 0.1702 0.0123 0.9599 20.00 1950. 190. 0.5178 0.1815 0.0132 0.9555 20.00 1960. 190. 0.5007 0.1882 0.0137 0.9525 20.00 1970. 190. 0.4314 0.2137 0.0155 0.9382 20.00 1980. 190. 0.4042 0.2605 0.0189 0.9313 20.00