Year	million passenger-km
1995	192217
1996	181213
1997	170318
1998	125625
1999	141042
2000	167054
2001	157901
2002	152900
2003	157100
2004	150800
2005	170900
2006	177639
2007	173411
2008	175871
2009	153575
2010	139028
2011	139842
2012	144612
2013	138517
2014	128820
2015	120413
2016	124461
2017	122920
2018	129370.701
2019	133380.866
2020	78134.699
2021	103447