Year	million ton-km
1970	234.6999969482
1971	230.6999969482
1972	220.1999969482
1973	266.6000061035
1974	315.299987793
1975	326.5
1976	354.200012207
1977	376.1000061035
1978	459.8999938965
1979	528.299987793
1980	516.5
1981	556.4000244141
1982	576
1983	624.9000244141
1984	734.0999755859
1985	814.799987793
1986	859.299987793
1987	990.799987793
1988	1027.0999755859
1989	1125.3000488281
1990	1222.3000488281
1991	1222.5999755859
1992	1361.5
1993	1525.8000488281
1994	1645.5
1995	1737.5
1996	1833.6999511719
1997	1953.8000488281
1998	1904.4000244141
1999	1693
2000	1730.735
2001	1678.089
2002	1544.717
2003	1355.351
2004	1898.071
2005	2444.586
2006	2569.506
2007	2348.084
2008	2212.4390000000003
2009	2769.286
2010	2938.314378037
2011	2846.59879756427
2012	2731.69798
2013	1984.693734
2014	1925.77200862967
2015	1907.05190944687
2016	1868.73262766
2017	1982.586170817
2018	2027.63710989603
2019	1931.1555305
2020	1316.50942
2021	1244.7647