| Similarity | Rank | |
|---|---|---|
| mid-November | 0.974 | 49602 |
| mid-January | 0.967 | 56453 |
| mid-October | 0.964 | 46407 |
| mid-February | 0.962 | 60898 |
| mid-September | 0.961 | 47464 |
| mid-March | 0.958 | 54346 |
| mid-August | 0.956 | 51260 |
| mid-April | 0.956 | 52831 |
| mid-June | 0.954 | 52394 |
| mid-July | 0.954 | 50883 |
| mid-May | 0.943 | 51182 |
| December | 0.828 | 1164 |
| January | 0.827 | 1183 |
| September | 0.822 | 1064 |
| October | 0.816 | 1063 |
| June | 0.816 | 977 |
| July | 0.813 | 1038 |
| March | 0.812 | 1020 |
| August | 0.811 | 1214 |
| April | 0.807 | 1032 |
| February | 0.805 | 1490 |
| November | 0.804 | 1119 |
| mid-2012 | 0.752 | 94809 |
| mid-2011 | 0.740 | 95634 |
| Dec. | 0.735 | 7222 |