Year	million passenger-km
2000	19228
2001	18270
2002	16329
2003	15031
2004	14777
2005	14345
2006	15579
2007	15872
2008	17937
2009	19779
2010	20340
2011	19024
2012	17154
2013	16926
2014	20396
2015	22296
2016	21636
2017	15558
2018	16932
2019	29066