Year	million ton-km
1995	1647
1996	1835
1997	1949
1998	1934
1999	1817
2000	1775
2001	1933
2002	1686
2003	2626
2004	2845
2005	3149
2006	3351
2007	3502
2008	3622
2009	3506
2010	3498
2011	3574
2012	3582
2013	3513
2014	3682
2015	3631
2016	3823
2017	4040
2018	3970
2019	3903
2020	4110
2021	4305