| Similarity | Rank | |
|---|---|---|
| 2006 | 0.988 | 1538 |
| 2005 | 0.986 | 1749 |
| 2008 | 0.986 | 1035 |
| 2009 | 0.981 | 927 |
| 2004 | 0.975 | 2062 |
| 2003 | 0.967 | 2268 |
| 2010 | 0.967 | 709 |
| 2002 | 0.959 | 2628 |
| 2001 | 0.945 | 2615 |
| 2011 | 0.945 | 635 |
| 1999 | 0.928 | 3420 |
| 1998 | 0.912 | 3724 |
| 1997 | 0.903 | 4165 |
| 2012 | 0.901 | 515 |
| 1996 | 0.887 | 4296 |
| 1995 | 0.882 | 4621 |
| 2000 | 0.874 | 2056 |
| 1994 | 0.861 | 4973 |
| 1993 | 0.854 | 5505 |
| 1992 | 0.854 | 5489 |
| February | 0.845 | 1490 |
| 1990 | 0.844 | 5524 |
| January | 0.841 | 1183 |
| September | 0.839 | 1064 |
| 1991 | 0.837 | 5992 |