| Similarity | Rank | |
|---|---|---|
| 1970 | 0.921 | 2583 |
| 1960 | 0.879 | 2807 |
| mid-1980 | 0.823 | 11219 |
| 1950 | 0.817 | 3691 |
| decade | 0.801 | 1661 |
| 1990 | 0.779 | 5663 |
| mid-to-late | 0.771 | 71501 |
| mid-1970 | 0.771 | 12406 |
| mid-1950s | 0.754 | 24366 |
| mid-1960s | 0.752 | 19473 |
| 1930 | 0.739 | 4100 |
| 1980s | 0.733 | 30850 |
| retrenchment | 0.728 | 28727 |
| 1940 | 0.717 | 7398 |
| post-war | 0.710 | 4355 |
| 1920 | 0.710 | 5459 |
| interwar | 0.706 | 19545 |
| 1960s | 0.698 | 56848 |
| recessionary | 0.696 | 26801 |
| mid-1970s | 0.695 | 56155 |
| mid-1960 | 0.694 | 49947 |
| urbanisation | 0.691 | 28493 |
| 1900 | 0.690 | 20137 |
| politicisation | 0.689 | 49318 |
| stagflation | 0.685 | 46761 |