Year	million passenger-km
1995	2101
1996	1722
1997	1158
1998	1092
1999	789
2000	1089.5
2001	1082.5
2002	954
2003	731.5
2004	1017
2005	1266
2006	1163
2007	1570
2008	1747.5
2009	1725
2010	1742
2011	1486
2012	1104
2013	948
2014	1314.5
2015	951
2016	836
2017	745
2018	756
2019	734
2020	347.969
2021	406.634