| YEAR | TRACKS REPORTED |
|---|---|
| 2017 | 690 |
| 2016 | 1215 |
| 2015 | 1123 |
| 2014 | 1151 |
| 2013 | 1180 |
| 2012 | 1102 |
| 2011 | 1175 |
| 2010 | 1319 |
| 2009 | 1628 |
| 2008 | 1446 |
| 2007 | 1748 |
| 2006 | 1887 |
| 2005 | 1739 |
| 2004 | 1720 |
| 2003 | 1713 |
| 2002 | 1441 |
| 2001 | 1248 |
| 2000 | 1324 |
| 1999 | 1149 |
| 1998 | 1212 |
| 1997 | 1000 |
| 1996 | 1123 |
| 1995 | 1027 |
| 1994 | 907 |
| 1993 | 860 |
| 1992 | 786 |
| 1991 | 864 |
| 1990 | 872 |
| 1989 | 810 |
| 1988 | 750 |
| 1987 | 726 |
| 1986 | 602 |
| 1985 | 640 |
| 1984 | 582 |
| 1983 | 643 |
| 1982 | 596 |
| 1981 | 578 |
| 1980 | 530 |