Year	total route-km
1995	2706
1996	2705
1997	2705
1998	2734
1999	2705
2000	2745
2001	2855
2002	2855
2003	2855
2004	2855
2005	2855
2006	2855
2007	2835
2008	2835
2009	2835
2010	2835
2011	2791
2012	2877
2013	2877
2014	2791
2015	2877
2016	2877
2017	2877
2018	2877
2019	2877