| YEAR | TRACKS REPORTED |
|---|---|
| 2018 | 1253 |
| 2017 | 1290 |
| 2016 | 1346 |
| 2015 | 1225 |
| 2014 | 1274 |
| 2013 | 1235 |
| 2012 | 1143 |
| 2011 | 1221 |
| 2010 | 1356 |
| 2009 | 1677 |
| 2008 | 1481 |
| 2007 | 1788 |
| 2006 | 1936 |
| 2005 | 1790 |
| 2004 | 1771 |
| 2003 | 1747 |
| 2002 | 1509 |
| 2001 | 1334 |
| 2000 | 1427 |
| 1999 | 1225 |
| 1998 | 1331 |
| 1997 | 1091 |
| 1996 | 1214 |
| 1995 | 1106 |
| 1994 | 984 |
| 1993 | 949 |
| 1992 | 854 |
| 1991 | 914 |
| 1990 | 919 |
| 1989 | 876 |
| 1988 | 815 |
| 1987 | 759 |
| 1986 | 646 |
| 1985 | 663 |
| 1984 | 618 |
| 1983 | 689 |
| 1982 | 646 |
| 1981 | 610 |
| 1980 | 556 |