Year	million passenger-km
1995	1876
1996	1392.5
1997	1250
1998	982
1999	789
2000	1070
2001	1014
2002	954.868
2003	964
2004	950
2005	903.5
2006	892.5
2007	1406
2008	1049
2009	1082.5
2010	1132.5
2011	1399
2012	1313
2013	1215
2014	1502.75
2015	1964.330166
2016	1908.5
2017	2340
2019	1571