Year	million ton-km
1970	4.5
1971	11.6000003815
1972	15.1000003815
1973	26.5
1974	35.7999992371
1975	50.0999984741
1976	82.5999984741
1977	105.8000030518
1978	136.5
1979	155.3000030518
1980	165.5
1981	243.1000061035
1982	353
1983	424.5
1984	458.799987793
1985	455.1000061035
1986	437.200012207
1987	453.200012207
1988	490
1989	604.700012207
1990	609.5999755859
1991	486.6000061035
1992	679.200012207
1993	718.299987793
1994	809.5
1995	894.9000244141
1996	862.799987793
1997	926.4000244141
1998	934
1999	1000
2000	999.56
2001	799.565
2002	862.29
2003	852.449
2004	956.687
2005	1021.453
2006	1066.281
2007	1229.704
2008	1382.547
2009	1838.162
2010	1324.861
2011	1501.275
2012	1815.016
2013	1694.372004
2014	1599.921996
2015	826.83
2016	833.991
2017	867.640758
2018	1085.47
2019	2043.245359
2020	581.5205976
2021	678.56349068879