| YEAR | TRACKS REPORTED |
|---|---|
| 2017 | 355 |
| 2016 | 1196 |
| 2015 | 1117 |
| 2014 | 1148 |
| 2013 | 1177 |
| 2012 | 1094 |
| 2011 | 1172 |
| 2010 | 1314 |
| 2009 | 1622 |
| 2008 | 1417 |
| 2007 | 1733 |
| 2006 | 1876 |
| 2005 | 1733 |
| 2004 | 1715 |
| 2003 | 1707 |
| 2002 | 1431 |
| 2001 | 1237 |
| 2000 | 1307 |
| 1999 | 1138 |
| 1998 | 1188 |
| 1997 | 983 |
| 1996 | 1114 |
| 1995 | 1007 |
| 1994 | 904 |
| 1993 | 850 |
| 1992 | 782 |
| 1991 | 855 |
| 1990 | 864 |
| 1989 | 798 |
| 1988 | 748 |
| 1987 | 715 |
| 1986 | 599 |
| 1985 | 637 |
| 1984 | 582 |
| 1983 | 643 |
| 1982 | 596 |
| 1981 | 578 |
| 1980 | 530 |