Year	million passenger-km
1995	43859
1996	44782
1997	43591
1998	41392
1999	43424
2000	47133
2001	46752
2002	45956
2003	45222
2004	49254
2005	50088
2006	50185
2007	49780
2008	49524
2009	48124
2010	47172
2011	46845
2012	46759
2013	48739
2014	49957
2015	52207
2016	52178
2017	53231
2018	55493
2019	56586
2020	22269
2021	27693