YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.3887 0.2461 0.0240 0.9201 18.10 1930. 171. 0.2592 0.2513 0.0192 0.8747 19.95 1940. 190. 0.2249 0.2432 0.0176 0.8530 20.00 1950. 190. 0.2166 0.2641 0.0192 0.8469 20.00 1960. 190. 0.2382 0.2718 0.0197 0.8622 20.00 1970. 190. 0.2797 0.3095 0.0225 0.8859 20.00 1980. 190. 0.3975 0.2688 0.0195 0.9296 20.00