| YEAR | TRACKS REPORTED |
|---|---|
| 2015 | 33 |
| 2014 | 944 |
| 2013 | 971 |
| 2012 | 845 |
| 2011 | 983 |
| 2010 | 1095 |
| 2009 | 1430 |
| 2008 | 1154 |
| 2007 | 1416 |
| 2006 | 1553 |
| 2005 | 1396 |
| 2004 | 1434 |
| 2003 | 1467 |
| 2002 | 1205 |
| 2001 | 1024 |
| 2000 | 971 |
| 1999 | 878 |
| 1998 | 920 |
| 1997 | 694 |
| 1996 | 776 |
| 1995 | 742 |
| 1994 | 684 |
| 1993 | 656 |
| 1992 | 582 |
| 1991 | 649 |
| 1990 | 684 |
| 1989 | 577 |
| 1988 | 609 |
| 1987 | 534 |
| 1986 | 446 |
| 1985 | 469 |
| 1984 | 388 |
| 1983 | 430 |
| 1982 | 419 |
| 1981 | 444 |
| 1980 | 374 |