Year	million ton-km
1970	184
1971	202.3999938965
1972	224.5
1973	238.6000061035
1974	286.1000061035
1975	281.200012207
1976	316.700012207
1977	338.8999938965
1978	375.799987793
1979	395.200012207
1980	394.5
1981	441.5
1982	479.1000061035
1983	489.1000061035
1984	525.4000244141
1985	565
1986	574.799987793
1987	535.5
1988	650.5
1989	660.700012207
1990	656.4000244141
1991	485.799987793
1992	386.299987793
1993	478.200012207
1994	515.200012207
1995	594.5999755859
1996	590.9000244141
1997	677.5999755859
1998	473
1999	535.4000244141
2000	1017.479
2001	852.778
2002	655.425
2003	604.608
2004	712.952
2005	705.13
2006	740.386
2007	755.193
2008	981.682
2009	1427.499
2010	1067.351
2011	1241.293
2012	1369.89982037629
2013	1560.81076
2014	1596.3044
2015	1479.9763156
2016	1505.4059084
2017	1574.378609
2018	1285.344187
2019	1353.426977272
2020	1265.065943534
2021	1827.413026121