Year	million passenger-km
1995	8023
1996	8111
1997	7721
1998	7210
1999	7848
2000	8224.5
2001	8732
2002	8587
2003	8549.5
2004	8667
2005	9043
2006	9595.5
2007	9474
2008	10406
2009	10427
2010	10403
2011	10875
2012	10857
2013	10595
2014	10974
2015	10333
2016	10025
2017	9832.283227
2018	10393.0095
2019	10930.618
2020	7031.0705
2021	5435.389