| YEAR | TRACKS REPORTED |
|---|---|
| 2014 | 158 |
| 2013 | 874 |
| 2012 | 722 |
| 2011 | 871 |
| 2010 | 1013 |
| 2009 | 1341 |
| 2008 | 1084 |
| 2007 | 1297 |
| 2006 | 1410 |
| 2005 | 1307 |
| 2004 | 1330 |
| 2003 | 1361 |
| 2002 | 1095 |
| 2001 | 895 |
| 2000 | 820 |
| 1999 | 791 |
| 1998 | 769 |
| 1997 | 539 |
| 1996 | 594 |
| 1995 | 557 |
| 1994 | 529 |
| 1993 | 504 |
| 1992 | 430 |
| 1991 | 502 |
| 1990 | 546 |
| 1989 | 386 |
| 1988 | 451 |
| 1987 | 375 |
| 1986 | 322 |
| 1985 | 329 |
| 1984 | 273 |
| 1983 | 259 |
| 1982 | 315 |
| 1981 | 343 |
| 1980 | 299 |