Year	million ton-km
1970	41.0999984741
1971	46.7999992371
1972	52.7000007629
1973	46.7000007629
1974	55.2000007629
1975	57.2000007629
1976	75.6999969482
1977	105.1999969482
1978	102.0999984741
1979	85
1980	144.8999938965
1981	153.3000030518
1982	141.6999969482
1983	120.3000030518
1984	105.4000015259
1985	114.1999969482
1986	137.1999969482
1987	186.3999938965
1988	242.8000030518
1989	329.5
1990	418.5
1991	428.8999938965
1992	529
1993	616.200012207
1994	652.5
1995	775.4000244141
1996	806.200012207
1997	1071.1999511719
1998	1246.1999511719
1999	1139.4000244141
2000	1312.011
2001	1277.282
2002	1098.015
2003	1130.19
2004	1094.133
2005	1053.819
2006	1027.669
2007	1294.967
2008	1307.721
2009	1179.048
2010	1399.549392
2011	1422.29934
2012	1527.067
2013	1512.319
2014	1553.479
2015	1392.236
2016	1441.23
2017	1237.960141
2018	1226.44199
2019	1232.41109
2020	1458.39578
2021	1283.99841