| YEAR | TRACKS REPORTED |
|---|---|
| 2019 | 54 |
| 2018 | 1302 |
| 2017 | 1291 |
| 2016 | 1345 |
| 2015 | 1230 |
| 2014 | 1277 |
| 2013 | 1236 |
| 2012 | 1145 |
| 2011 | 1223 |
| 2010 | 1362 |
| 2009 | 1684 |
| 2008 | 1490 |
| 2007 | 1796 |
| 2006 | 1947 |
| 2005 | 1797 |
| 2004 | 1783 |
| 2003 | 1754 |
| 2002 | 1513 |
| 2001 | 1337 |
| 2000 | 1430 |
| 1999 | 1228 |
| 1998 | 1337 |
| 1997 | 1097 |
| 1996 | 1214 |
| 1995 | 1109 |
| 1994 | 989 |
| 1993 | 950 |
| 1992 | 860 |
| 1991 | 916 |
| 1990 | 920 |
| 1989 | 881 |
| 1988 | 817 |
| 1987 | 763 |
| 1986 | 652 |
| 1985 | 673 |
| 1984 | 619 |
| 1983 | 691 |
| 1982 | 648 |
| 1981 | 610 |
| 1980 | 558 |