Year	million passenger-km
1995	1876
1996	1776
1997	1360
1998	1265.5
1999	1137
2000	1236
2001	1181
2002	1122
2003	1039
2004	1220.5
2005	1317
2006	1421
2007	2308.5
2008	2039
2009	2245.225
2010	1811
2011	2068
2012	1876
2013	2413.241413
2014	1811
2015	1964.330166
2016	2336
2017	2468.088213
2018	2929.5316629999998
2019	2200.050277