| YEAR | TRACKS REPORTED |
|---|---|
| 2019 | 224 |
| 2018 | 1307 |
| 2017 | 1300 |
| 2016 | 1359 |
| 2015 | 1235 |
| 2014 | 1281 |
| 2013 | 1239 |
| 2012 | 1148 |
| 2011 | 1224 |
| 2010 | 1362 |
| 2009 | 1685 |
| 2008 | 1492 |
| 2007 | 1798 |
| 2006 | 1952 |
| 2005 | 1796 |
| 2004 | 1784 |
| 2003 | 1755 |
| 2002 | 1516 |
| 2001 | 1339 |
| 2000 | 1434 |
| 1999 | 1236 |
| 1998 | 1347 |
| 1997 | 1106 |
| 1996 | 1223 |
| 1995 | 1116 |
| 1994 | 1000 |
| 1993 | 960 |
| 1992 | 865 |
| 1991 | 922 |
| 1990 | 921 |
| 1989 | 881 |
| 1988 | 819 |
| 1987 | 763 |
| 1986 | 652 |
| 1985 | 673 |
| 1984 | 618 |
| 1983 | 692 |
| 1982 | 647 |
| 1981 | 610 |
| 1980 | 558 |