Year	million passenger-km
1995	22079.197517351
1996	21865.609594934
1997	22746.357703048
1998	23490.391327033
1999	23910.674990425
2000	25977.28144892
2001	25198.095303748
2002	24409.622511445
2003	25044.071809908
2004	24776.56200888
2005	25393.591629483
2006	27296.432407703
2007	30357.906712861
2008	32143.406016433
2009	30906.931637514
2010	31871.671919151
2011	32579.510200833
2012	34125.70065511
2013	36047.104941171
2014	36393.106488533
2015	36043.875681391
2016	35892.157355569
2017	33256
2018	31963
2019	32483
2020	12460