Year	million ton-km
1992	32.2000007629
1993	8
1994	8
1995	17.6000003815
1996	16.7000007629
1997	16.7000007629
1998	24
1999	9.8000001907
2000	11.752
2001	11.82
2002	20.263
2003	20.796
2004	12.557
2005	15.825
2006	16.382
2007	17.212
2008	16.487000000000002
2009	14.584
2010	42.379
2011	50.977
2012	53.977
2013	58.199004
2014	44.61
2015	37.669008
2016	38.89446
2017	49.5077
2018	49.64306
2019	49.84901
2020	23.53957
2021	31.44797