Year	million passenger-km
1995	1270
1996	1370
1997	1492
1998	1397
1999	1316
2000	1220
2001	1181
2002	2256
2003	1931
2004	1931
2005	2152
2006	2120
2007	2193
2008	2268
2009	2346.45
2010	2414.88
2011	2497
2012	2321.3586
2013	2413.241413
2014	1985.694289
2015	1964.330166
2016	2344.190264
2017	2468.088213
2018	2317.063326
2019	2200.050277
2020	929.341054