Year	million passenger-km
1995	1382
1996	1411
1997	1440
1998	1469
1999	1498
2000	1548
2001	1553
2002	1596
2003	1433
2004	1413
2005	1478
2006	1450
2007	1453
2008	1574
2009	1413
2010	1404
2011	1404
2012	1376
2013	1365
2014	1327
2015	1349
2016	1408
2017	1534
2018	1530
2019	1731
2020	229
2021	536