Year	million passenger-km
1995	63752
1996	59080
1997	54433
1998	49938
1999	47600
2000	51767
2001	49661
2002	50544
2003	52558
2004	51726
2005	52655
2006	53230
2007	53089
2008	53056
2009	48327
2010	50248
2011	50593
2012	49329
2013	48981
2014	35865
2015	35367
2016	36839
2017	28075
2018	28685
2019	28413
2020	10696