Year	million passenger-km
1995	13159
1996	14188
1997	12801
1998	10668
1999	8859
2007	14587.4
2008	14130.5
2009	14519.9
2010	15799.7
2011	16482.8
2012	19081.1
2013	20619
2014	23750.5
2015	21614.8
2016	17321.8
2017	17961.5
2018	18509.5
2019	17700
2020	8649.3