Year	million passenger-km
1995	5813
1996	5926.5
1997	6433
1998	6090.5
1999	6035
2000	6418.5
2001	6510
2002	6175.5
2003	6205.5
2004	6332
2005	6401.5
2006	6598
2007	6626.5
2008	6639
2009	6247.5
2010	6007.5
2011	5893.5
2012	5795.5
2013	5743.5
2014	5892
2015	5978.5
2016	5820.5
2017	6143
2018	6068.5
2019	5906
2020	3837.1125
2021	2912