Year	million passenger-km
1995	11730.5987586755
1996	11638.304797467
1997	12093.178851524
1998	12479.6956635165
1999	12704.3374952125
2000	13762.64072446
2001	13375.547651874
2002	13002.8112557225
2003	13238.535904954
2004	13094.78100444
2005	13435.7958147415
2006	14373.2162038515
2007	15905.4533564305
2008	16858.7030082165
2009	16159.965818757
2010	16637.8359595755
2011	16991.7551004165
2012	17750.850327555
2013	18706.0524705855
2014	18860.0532442665
2015	18696.4378406955
2016	18650.0786777845
2017	17395
2018	16746.5
2019	17107
2020	6344.5
2021	536