2010 - 110,000 km
2016 - 103,000 km
2011 - 92,000 km
2015 - 57,000 km
2014 - 40,700 km
2006 - 200,000 km
2013 - 78,000 km
2019 - 70,566 km
2011 - 56,639 km
2010 - 56,000 km
2015 - 90,000 km
2013 - 86,000 km