Year	million passenger-km
1995	6795
1996	6870.5
1997	7001
1998	7057.5
1999	7155.5
2000	7527.5
2001	7667.5
2002	7428.5
2003	7383.5
2004	7442.5
2005	7985
2006	8092
2007	7476
2008	7625.5
2009	8073
2010	6591
2011	7348
2012	7535.5
2013	7722
2014	7738
2015	7609.161
2016	7653.455
2017	6623
2018	6560
2019	7751.606
2020	4854.225
2021	2907.5