| Year | Distance |
|---|---|
| 1997 | 2,686 |
| 1998 | 3,774 |
| 1999 | 2,587 |
| 2000 | 3,933 |
| 2001 | 5,374 |
| 2002 | 2,218 |
| 2003 | 651 |
| 2004 | 2,269 |
| 2005 | 5,375 |
| 2006 | 4,763 |
| 2007 | 5,875 |
| 2008 | 6,408 |
| 2009 | 7,225 |
| 2010 | 6,018 |
| 2011 | 3,851 |
| 2012 | 5,321 |
| 2013 | 5,556 |
| 2014 | 6,121 |
| 2015 | 5,431 |
| 2016 | 6,930 |
| 2017 | 7,668 |
| Total | 100,034 |