| YEAR | TRACKS REPORTED |
|---|---|
| 2019 | 611 |
| 2018 | 1316 |
| 2017 | 1306 |
| 2016 | 1380 |
| 2015 | 1266 |
| 2014 | 1297 |
| 2013 | 1266 |
| 2012 | 1170 |
| 2011 | 1237 |
| 2010 | 1363 |
| 2009 | 1686 |
| 2008 | 1492 |
| 2007 | 1799 |
| 2006 | 1953 |
| 2005 | 1796 |
| 2004 | 1789 |
| 2003 | 1755 |
| 2002 | 1516 |
| 2001 | 1339 |
| 2000 | 1434 |
| 1999 | 1236 |
| 1998 | 1347 |
| 1997 | 1106 |
| 1996 | 1223 |
| 1995 | 1117 |
| 1994 | 1000 |
| 1993 | 960 |
| 1992 | 865 |
| 1991 | 922 |
| 1990 | 921 |
| 1989 | 881 |
| 1988 | 819 |
| 1987 | 763 |
| 1986 | 651 |
| 1985 | 673 |
| 1984 | 619 |
| 1983 | 692 |
| 1982 | 649 |
| 1981 | 610 |
| 1980 | 559 |