| Similarity | Rank | |
|---|---|---|
| 1950 | 0.878 | 3691 |
| 1960 | 0.849 | 2807 |
| 1930 | 0.842 | 4100 |
| 1920 | 0.814 | 5459 |
| 1970 | 0.770 | 2583 |
| 1870 | 0.744 | 11182 |
| 1880 | 0.737 | 9812 |
| 1900 | 0.724 | 20137 |
| 1980 | 0.717 | 2404 |
| 1890 | 0.707 | 10843 |
| post-war | 0.702 | 4355 |
| 1800 | 0.698 | 33369 |
| mid-1960s | 0.694 | 19473 |
| mid-1960 | 0.689 | 49947 |
| mid-1970 | 0.685 | 12406 |
| 1960s | 0.684 | 56848 |
| 1830 | 0.683 | 13819 |
| nineteenth | 0.675 | 2686 |
| post-1945 | 0.674 | 34032 |
| 1910 | 0.673 | 77774 |
| losey | 0.668 | 86125 |
| decade | 0.666 | 1661 |
| '40s | 0.664 | 46704 |
| mid-1980 | 0.664 | 11219 |
| twentieth | 0.661 | 3963 |