| YEAR | TRACKS REPORTED |
|---|---|
| 2018 | 799 |
| 2017 | 1238 |
| 2016 | 1323 |
| 2015 | 1189 |
| 2014 | 1240 |
| 2013 | 1225 |
| 2012 | 1123 |
| 2011 | 1194 |
| 2010 | 1347 |
| 2009 | 1669 |
| 2008 | 1477 |
| 2007 | 1780 |
| 2006 | 1936 |
| 2005 | 1778 |
| 2004 | 1766 |
| 2003 | 1747 |
| 2002 | 1502 |
| 2001 | 1327 |
| 2000 | 1404 |
| 1999 | 1208 |
| 1998 | 1286 |
| 1997 | 1066 |
| 1996 | 1186 |
| 1995 | 1088 |
| 1994 | 955 |
| 1993 | 917 |
| 1992 | 834 |
| 1991 | 894 |
| 1990 | 903 |
| 1989 | 847 |
| 1988 | 787 |
| 1987 | 752 |
| 1986 | 629 |
| 1985 | 663 |
| 1984 | 615 |
| 1983 | 681 |
| 1982 | 645 |
| 1981 | 608 |
| 1980 | 553 |