Year	total route-km
1995	4290
1996	4219
1997	4219
1998	4272
1999	3973
2000	3973
2001	3572
2002	3572
2003	3572
2004	3572
2005	3572
2006	3572
2007	3572
2008	3572
2009	4723
2010	3664
2011	4226
2012	4175
2014	3799.94
2015	3799.94
2016	3843.17
2017	4016.25
2018	4016.25
2019	4020.25
2021	4000.5