Year	million passenger-km
1995	4684
1996	4503
1997	3969.5
1998	3989.5
1999	3617.5
2000	3405
2001	3272
2002	3153.5
2003	3338
2004	2683.457775
2005	3615.5
2006	2832.39148
2007	3367.977605
2008	4052
2009	3478.0718935
2010	3546.6917355
2011	3478.9870615
2012	3620.4
2013	4232
2014	3852
2015	3857.5
2016	3901
2017	4282.5
2018	4510.5
2019	4924
2020	2366
2021	2477.5