Year	million passenger-km
1995	2681
1996	2803
1997	2941
1998	3071
1999	3416
2000	3353
2001	3272
2002	2989
2003	2896
2004	2683.457775
2005	2723.402598
2006	2832.39148
2007	2957.95521
2008	3106.985939
2009	3080.143787
2010	3134.383471
2011	3075.974123
2012	3091.569419
2013	3260
2014	3440
2015	3555
2016	3695
2017	3584
2018	3722
2019	3715
2020	1804
2021	1780