Year	million passenger-km
1995	680
1996	744
1997	957
1998	982
1999	1013
2000	1070
2001	1072
2002	1073
2003	1039
2004	1228
2006	1288.5
2007	1406
2008	1400
2009	1008
2010	1220
2011	1399
2012	1485
2013	1394
2014	1194.5
2015	996.74
2016	956
2017	973
2019	1112
2020	580
2021	91