| Similarity | Rank | |
|---|---|---|
| mid-1950s | 0.974 | 83299 |
| mid-1970s | 0.966 | 53815 |
| 1960s | 0.957 | 7911 |
| 1970s | 0.948 | 7314 |
| 1950s | 0.932 | 9648 |
| mid-1980s | 0.931 | 43287 |
| 1960's | 0.922 | 19445 |
| 1980s | 0.920 | 7178 |
| 1970's | 0.916 | 18387 |
| 1940s | 0.912 | 16777 |
| 1980's | 0.889 | 18127 |
| 1990s | 0.882 | 7471 |
| mid-1990s | 0.881 | 35693 |
| 1930s | 0.878 | 11976 |
| 1950's | 0.877 | 20985 |
| 1990's | 0.869 | 20839 |
| 1920s | 0.865 | 14792 |
| 1940's | 0.857 | 33633 |
| '60s | 0.842 | 25607 |
| 1910s | 0.840 | 92300 |
| 1930's | 0.837 | 26347 |
| '70s | 0.834 | 23330 |
| seventies | 0.830 | 24080 |
| sixties | 0.827 | 21797 |
| '40s | 0.827 | 67219 |