| YEAR | TRACKS REPORTED |
|---|---|
| 2021 | 10 |
| 2020 | 903 |
| 2019 | 1571 |
| 2018 | 1488 |
| 2017 | 1478 |
| 2016 | 1549 |
| 2015 | 1407 |
| 2014 | 1416 |
| 2013 | 1424 |
| 2012 | 1275 |
| 2011 | 1358 |
| 2010 | 1495 |
| 2009 | 1825 |
| 2008 | 1647 |
| 2007 | 1919 |
| 2006 | 2067 |
| 2005 | 1926 |
| 2004 | 1899 |
| 2003 | 1816 |
| 2002 | 1568 |
| 2001 | 1397 |
| 2000 | 1496 |
| 1999 | 1307 |
| 1998 | 1425 |
| 1997 | 1159 |
| 1996 | 1290 |
| 1995 | 1176 |
| 1994 | 1038 |
| 1993 | 995 |
| 1992 | 900 |
| 1991 | 978 |
| 1990 | 987 |
| 1989 | 937 |
| 1988 | 873 |
| 1987 | 808 |
| 1986 | 681 |
| 1985 | 721 |
| 1984 | 659 |
| 1983 | 725 |
| 1982 | 679 |
| 1981 | 623 |
| 1980 | 586 |