| Year | % Correct |
|---|---|
| 2020 | 96%
|
| 1976 | 92%
|
| 1992 | 88%
|
| 1980 | 85%
|
| 1960 | 81%
|
| 1796 | 73%
|
| 1800 | 73%
|
| 1912 | 73%
|
| 1932 | 73%
|
| 1824 | 69%
|
| 1828 | 69%
|
| 1836 | 69%
|
| 1888 | 69%
|
| 1892 | 69%
|
| 1840 | 65%
|