| YEAR | TRACKS REPORTED |
|---|---|
| 2020 | 486 |
| 2019 | 1478 |
| 2018 | 1366 |
| 2017 | 1354 |
| 2016 | 1436 |
| 2015 | 1322 |
| 2014 | 1351 |
| 2013 | 1319 |
| 2012 | 1201 |
| 2011 | 1265 |
| 2010 | 1404 |
| 2009 | 1757 |
| 2008 | 1574 |
| 2007 | 1849 |
| 2006 | 2006 |
| 2005 | 1845 |
| 2004 | 1829 |
| 2003 | 1782 |
| 2002 | 1551 |
| 2001 | 1367 |
| 2000 | 1460 |
| 1999 | 1268 |
| 1998 | 1387 |
| 1997 | 1144 |
| 1996 | 1240 |
| 1995 | 1136 |
| 1994 | 1024 |
| 1993 | 983 |
| 1992 | 897 |
| 1991 | 946 |
| 1990 | 961 |
| 1989 | 913 |
| 1988 | 868 |
| 1987 | 797 |
| 1986 | 671 |
| 1985 | 707 |
| 1984 | 644 |
| 1983 | 713 |
| 1982 | 666 |
| 1981 | 619 |
| 1980 | 576 |