| YEAR | TRACKS REPORTED |
|---|---|
| 2020 | 746 |
| 2019 | 1512 |
| 2018 | 1405 |
| 2017 | 1413 |
| 2016 | 1462 |
| 2015 | 1368 |
| 2014 | 1384 |
| 2013 | 1342 |
| 2012 | 1224 |
| 2011 | 1303 |
| 2010 | 1424 |
| 2009 | 1772 |
| 2008 | 1579 |
| 2007 | 1858 |
| 2006 | 2013 |
| 2005 | 1854 |
| 2004 | 1845 |
| 2003 | 1785 |
| 2002 | 1557 |
| 2001 | 1378 |
| 2000 | 1474 |
| 1999 | 1286 |
| 1998 | 1394 |
| 1997 | 1151 |
| 1996 | 1242 |
| 1995 | 1138 |
| 1994 | 1027 |
| 1993 | 983 |
| 1992 | 898 |
| 1991 | 958 |
| 1990 | 966 |
| 1989 | 914 |
| 1988 | 868 |
| 1987 | 798 |
| 1986 | 673 |
| 1985 | 708 |
| 1984 | 646 |
| 1983 | 714 |
| 1982 | 666 |
| 1981 | 618 |
| 1980 | 579 |