Year	total route-km
1995	9430
1996	9435
1997	9430
1998	9430
1999	9365
2000	9365
2001	9444
2002	9499
2003	9501
2004	9511
2005	9513
2006	9491
2007	9481
2008	9486
2009	9477
2010	9468.848
2011	9470.16
2012	9468.265
2013	9459.031
2014	9457.612
2015	9466.893
2016	9462.687
2017	9408
2018	9406
2019	9396
2020	9377
2021	9357