| Similarity | Rank | |
|---|---|---|
| 2010 | 0.984 | 709 |
| 2008 | 0.983 | 1035 |
| 2007 | 0.981 | 1267 |
| 2011 | 0.978 | 635 |
| 2006 | 0.978 | 1538 |
| 2005 | 0.967 | 1749 |
| 2004 | 0.952 | 2062 |
| 2012 | 0.938 | 515 |
| 2003 | 0.926 | 2268 |
| 2002 | 0.926 | 2628 |
| 2001 | 0.910 | 2615 |
| 1999 | 0.889 | 3420 |
| 1998 | 0.873 | 3724 |
| February | 0.873 | 1490 |
| September | 0.872 | 1064 |
| January | 0.870 | 1183 |
| June | 0.868 | 977 |
| March | 0.865 | 1020 |
| 1997 | 0.863 | 4165 |
| October | 0.863 | 1063 |
| April | 0.863 | 1032 |
| November | 0.861 | 1119 |
| August | 0.857 | 1214 |
| December | 0.857 | 1164 |
| 2013 | 0.851 | 461 |