| YEAR | TRACKS REPORTED |
|---|---|
| 2014 | 554 |
| 2013 | 893 |
| 2012 | 744 |
| 2011 | 879 |
| 2010 | 1042 |
| 2009 | 1359 |
| 2008 | 1091 |
| 2007 | 1300 |
| 2006 | 1412 |
| 2005 | 1311 |
| 2004 | 1341 |
| 2003 | 1368 |
| 2002 | 1105 |
| 2001 | 907 |
| 2000 | 821 |
| 1999 | 793 |
| 1998 | 777 |
| 1997 | 545 |
| 1996 | 602 |
| 1995 | 567 |
| 1994 | 533 |
| 1993 | 518 |
| 1992 | 442 |
| 1991 | 510 |
| 1990 | 562 |
| 1989 | 416 |
| 1988 | 473 |
| 1987 | 384 |
| 1986 | 340 |
| 1985 | 338 |
| 1984 | 278 |
| 1983 | 275 |
| 1982 | 315 |
| 1981 | 343 |
| 1980 | 300 |