Year	million ton-km
1970	235.1999989373
1971	244.29999955760002
1972	239.49999967230002
1973	292.20000067349997
1974	373.7000040335001
1975	431.1000040700001
1976	487.1000073778001
1977	510.00000555829996
1978	576.7000051291999
1979	688.0999984446004
1980	731.8999980987003
1981	796.0999990405
1982	821.5000046639001
1983	818.2000029833
1984	936.9999975116001
1985	1033.8999912068998
1986	1015.1000111701
1987	1154.5999920369998
1988	1246.9999826996
1989	1283.700012653999
1990	1262.6000077646995
1991	1215.7999909596
1992	1277.9000075906001
1993	1264.6999935358
1994	1497.7000121102
1995	1574.0999926626002
1996	1543.400007501
1997	1587.3000118658001
1998	1506.2999872193004
1999	1559.2999856473
2000	1715.8380000000002
2001	1613.0010000953678
2002	1339.807
2003	1393.344
2004	1649.7869999999998
2005	1746.9050000000002
2006	1864.498
2007	1642.6340000000002
2008	1672.3559999999998
2009	1640.805
2010	2074.278823823671
2011	2110.896548039535
2012	2350.0792467346896
2013	2526.9160351212936
2014	2504.947107241977
2015	2536.7113288180817
2016	2821.293665550079
2017	3487.0405960317657
2018	3513.7978915788326
2019	3915.948288271818
2020	3677.185975010164
2021	4872.534804244001