| YEAR | TRACKS REPORTED |
|---|---|
| 2020 | 39 |
| 2019 | 1445 |
| 2018 | 1351 |
| 2017 | 1323 |
| 2016 | 1411 |
| 2015 | 1284 |
| 2014 | 1317 |
| 2013 | 1280 |
| 2012 | 1177 |
| 2011 | 1247 |
| 2010 | 1376 |
| 2009 | 1703 |
| 2008 | 1537 |
| 2007 | 1826 |
| 2006 | 1974 |
| 2005 | 1815 |
| 2004 | 1809 |
| 2003 | 1765 |
| 2002 | 1527 |
| 2001 | 1343 |
| 2000 | 1439 |
| 1999 | 1236 |
| 1998 | 1348 |
| 1997 | 1107 |
| 1996 | 1223 |
| 1995 | 1118 |
| 1994 | 1002 |
| 1993 | 961 |
| 1992 | 866 |
| 1991 | 921 |
| 1990 | 928 |
| 1989 | 882 |
| 1988 | 820 |
| 1987 | 764 |
| 1986 | 653 |
| 1985 | 675 |
| 1984 | 618 |
| 1983 | 694 |
| 1982 | 650 |
| 1981 | 610 |
| 1980 | 561 |