YEAR CORRS RBAR SDEV SERR EPS CORES 1920. 105. 0.5001 0.1888 0.0184 0.9477 18.10 1930. 171. 0.2869 0.2683 0.0205 0.8892 19.95 1940. 190. 0.2289 0.2707 0.0196 0.8559 20.00 1950. 190. 0.1977 0.2844 0.0206 0.8313 20.00 1960. 190. 0.2687 0.2715 0.0197 0.8802 20.00 1970. 190. 0.2444 0.3248 0.0236 0.8661 20.00 1980. 190. 0.3540 0.3040 0.0221 0.9164 20.00