Year	total route-km
1980	194942
1981	194607
1982	196113
1983	196665
1984	197404
1985	199163
1986	199154.5
1987	199073.15
1988	199293.02
1989	201837.37
1990	204294.618483871
1991	206316.555483871
1992	207328.555483871
1993	206648.915483871
1994	207364.715483871
1995	206250.905483871
1996	211588.055483871
1997	212232.445483871
1998	213347.445483871
1999	212732.275483871
2000	215546.935483871
2001	216331.935483871
2002	216099.935483871
2003	213918.935483871
2004	214410.935483871
2005	218053.935483871
2006	217446.935483871
2007	222465.935483871
2008	222469.935483871
2009	209572.935483871
2010	211232.935483871
2011	212099.935483871
2012	212033.935483871
2013	212183.275483871
2014	213707.935483871
2015	215126.725483871
2016	215271.985483871