| YEAR | TRACKS REPORTED |
|---|---|
| 2018 | 1087 |
| 2017 | 1256 |
| 2016 | 1331 |
| 2015 | 1206 |
| 2014 | 1256 |
| 2013 | 1233 |
| 2012 | 1138 |
| 2011 | 1211 |
| 2010 | 1354 |
| 2009 | 1672 |
| 2008 | 1478 |
| 2007 | 1784 |
| 2006 | 1939 |
| 2005 | 1780 |
| 2004 | 1767 |
| 2003 | 1747 |
| 2002 | 1505 |
| 2001 | 1330 |
| 2000 | 1410 |
| 1999 | 1216 |
| 1998 | 1314 |
| 1997 | 1084 |
| 1996 | 1206 |
| 1995 | 1095 |
| 1994 | 971 |
| 1993 | 932 |
| 1992 | 845 |
| 1991 | 902 |
| 1990 | 909 |
| 1989 | 853 |
| 1988 | 807 |
| 1987 | 756 |
| 1986 | 645 |
| 1985 | 663 |
| 1984 | 615 |
| 1983 | 681 |
| 1982 | 646 |
| 1981 | 609 |
| 1980 | 556 |