Year	total route-km
1995	16003
1996	16014
1997	16030
1998	16080
1999	16092
2000	16295
2001	16357
2002	16307
2003	16288
2004	16285.5
2005	16751
2006	16627.1
2007	16667.3
2008	16860.9
2009	17003.842
2010	16703.7
2011	16726.4
2012	16741.6
2013	16751.6
2014	16722.6
2015	16723.8
2016	16788.3
2017	16787.2
2018	16780.8
2019	16778.6
2020	17255.6
2021	17305.2