| 1979 | 824 | 1993 | 6131 | 2007 | 25,000 |
| 1980 | 1231 | 1994 | 7372 | 2008 | 23,850 |
| 1981 | 1607 | 1995 | 9,322 | 2009 | 22,500 |
| 1982 | 2435 | 1996 | 10,038 | 2010 | 19,528 |
| 1983 | 2821 | 1997 | 10,048 | 2011 | 17,139 |
| 1984 | 3269 | 1998 | 11,218 | 2012 | 16,433 |
| 1985 | 3698 | 1999 | 14,424 | 2013 | 17,139 |
| 1986 | 4004 | 2000 | 17,167 | 2014 | 17,255 |
| 1987 | 4213 | 2001 | 17,356 | 2015 | 17,789 |
| 1988 | 2458 | 2002 | 17,544 | 2016 | 17,986 |
| 1989 | 2630 | 2003 | 16,860 | 2017 | 18,153 |
| 1990 | 3452 | 2004 | 17,892 | 2018 | 18,311 |
| 1991 | 4069 | 2005 | 21,942 | ||
| 1992 | 4682 | 2006 | 25,090 |