Year	million passenger-km
1995	1701.5
1996	1923
1997	1964.5
1998	1969.5
1999	2018.5
2000	3200
2001	3697
2002	4115
2003	4041
2004	4163
2005	6876.5
2007	6348
2010	6282.5
2011	6301.5
2015	4233.88
2016	2880.095132
2017	4838.5