| Year | Distance |
|---|---|
| 1999 | 13,597 |
| 2000 | 15,170 |
| 2001 | 5,710 |
| 2002 | 8,618 |
| 2003 | 8,402 |
| 2004 | 10,269 |
| 2005 | 11,072 |
| 2006 | 8,919 |
| 2007 | 8,936 |
| 2008 | 8,291 |
| 2009 | 6,643 |
| 2010 | 9,241 |
| 2011 | 10,910 |
| 2012 | 6,259 |
| 2013 | 7,810 |
| 2014 | 9,940 |
| 2015 | 7,056 |
| 2016 | 7,211 |
| 2017 | 4,619 |
| 2018 | 4,747 |
| Total | 173,420 |