| Similarity | Rank | |
|---|---|---|
| mid-December | 0.974 | 50593 |
| mid-October | 0.974 | 46407 |
| mid-April | 0.969 | 52831 |
| mid-September | 0.969 | 47464 |
| mid-March | 0.967 | 54346 |
| mid-January | 0.965 | 56453 |
| mid-February | 0.961 | 60898 |
| mid-June | 0.961 | 52394 |
| mid-August | 0.958 | 51260 |
| mid-July | 0.957 | 50883 |
| mid-May | 0.951 | 51182 |
| September | 0.833 | 1064 |
| January | 0.829 | 1183 |
| October | 0.828 | 1063 |
| December | 0.827 | 1164 |
| June | 0.819 | 977 |
| March | 0.816 | 1020 |
| August | 0.816 | 1214 |
| November | 0.815 | 1119 |
| July | 0.814 | 1038 |
| April | 0.812 | 1032 |
| February | 0.812 | 1490 |
| mid-2012 | 0.758 | 94809 |
| mid-2011 | 0.751 | 95634 |
| mid-summer | 0.750 | 64964 |