Year	million passenger-km
1995	1291
1996	1295
1997	1387
1998	1421
1999	1458
2000	1389
2001	1515
2002	1628
2003	1601
2004	1582
2005	1781
2006	1872
2007	2007
2008	1976
2009	1683
2010	1678
2011	1638
2012	1578
2013	1592
2014	1863
2015	1917
2016	1990
2017	2121
2018	2281
2019	2399
2020	834
2021	870