| Year | % Correct |
|---|---|
| 1929 | 93%
|
| 1961 | 93%
|
| 1963 | 93%
|
| 1969 | 93%
|
| 1974 | 93%
|
| 1933 | 90%
|
| 1945 | 90%
|
| 1953 | 90%
|
| 1921 | 88%
|
| 1977 | 88%
|
| 1981 | 88%
|
| 1989 | 88%
|
| 1993 | 88%
|
| 1913 | 85%
|
| 2001 | 85%
|
| 2009 | 85%
|
| 1923 | 83%
|
| 1909 | 78%
|
| 1901 | 76%
|
| 1897 | 66%
|
| 1885 | 63%
|
| 1861 | 61%
|
| 1865 | 61%
|
| 1869 | 61%
|
| 1881 | 61%
|
| 1893 | 61%
|
| 1877 | 59%
|
| 1889 | 59%
|
| 1849 | 56%
|
| 1853 | 56%
|
| 1857 | 56%
|
| 1845 | 51%
|
| 1850 | 51%
|
| 1797 | 49%
|
| 1841 | 49%
|
| 1817 | 46%
|
| 1825 | 46%
|
| 1829 | 46%
|
| 1837 | 46%
|
| 1801 | 44%
|
| 1809 | 44%
|