| Year | Rank | Number |
| 2011 | 14649 | 7 |
| 2010 | 13339 | 8 |
| 2009 | 13517 | 8 |
| 2004 | 14091 | 7 |
| 2003 | 15672 | 6 |
| 2001 | 17857 | 5 |
| 1999 | 12627 | 7 |
| 1998 | 14049 | 6 |
| 1997 | 13662 | 6 |
| 1995 | 13335 | 6 |
| 1994 | 13379 | 6 |
| 1993 | 13393 | 6 |
| 1990 | 15188 | 5 |
| 1989 | 14484 | 5 |
| 1988 | 11747 | 6 |
| Year | Rank | Number |
| 2011 | 14649 | 7 |
| 2010 | 13339 | 8 |
| 2009 | 13517 | 8 |
| 2004 | 14091 | 7 |
| 2003 | 15672 | 6 |
| 2001 | 17857 | 5 |
| 1999 | 12627 | 7 |
| 1998 | 14049 | 6 |
| 1997 | 13662 | 6 |
| 1995 | 13335 | 6 |
| 1994 | 13379 | 6 |
| 1993 | 13393 | 6 |
| 1990 | 15188 | 5 |
| 1989 | 14484 | 5 |
| 1988 | 11747 | 6 |