Year	total route-km
1995	7988
1996	7988
1997	7988
1998	7988
1999	7988
2000	8005
2001	7736
2002	7950
2003	7950
2004	7950
2005	7950
2006	7960
2007	7942
2008	7892
2009	7892
2010	7902.7
2011	7877.9
2012	7894.8
2013	7894.8
2014	7894.8
2015	7896
2016	7748.7
2017	7751.7
2018	7587.7
2019	7587.7
2020	7587.7
2021	8037