Year	million ton-km
1995	53
1996	42
1997	23
1998	25
1999	26
2000	28
2001	19
2002	21
2003	32
2004	32
2005	26
2006	36
2007	53
2008	52
2009	46
2010	66
2011	50
2012	25
2013	23
2014	39.887
2015	23.124
2016	8.8
2017	25.3
2018	20.4
2019	43
2020	26.039
2021	25.1151187