| Year | Distance |
|---|---|
| 1984 | 5,041 |
| 1985 | 2,507 |
| 1986 | 2,519 |
| 1987 | 238 |
| 1988 | 125 |
| 1989 | 1,234 |
| 1990 | 1,390 |
| 1991 | 2,043 |
| 1992 | 711 |
| 1993 | 1,129 |
| 1994 | 438 |
| 1995 | 161 |
| 1997 | 180 |
| 1998 | 539 |
| 1999 | 1,142 |
| 2000 | 3,077 |
| 2001 | 392 |
| 2002 | 243 |
| 2003 | 1,332 |
| 2004 | 1,468 |
| 2005 | 2,539 |
| 2006 | 2,563 |
| 2007 | 3,720 |
| 2008 | 3,991 |
| 2009 | 4,087 |
| 2010 | 1,910 |
| 2011 | 1,343 |
| 2012 | 1,175 |
| 2013 | 3,047 |
| 2014 | 2,790 |
| 2015 | 2,644 |
| 2016 | 1,142 |
| 2017 | 321 |
| Total | 57,181 |