Year	million ton-km
1970	289.1000053434
1971	360.300005421
1972	437.3000055476
1973	585.3000170514001
1974	664.9999884888
1975	725.899995953
1976	859.4999994486
1977	881.2000132201998
1978	872.9999966995001
1979	982.3000238018001
1980	1005.3999844117999
1981	959.4999890253
1982	967.5000009907001
1983	1064.2999763042
1984	998.5000078453999
1985	712.7000045701999
1986	557.0000071674
1987	825.5000088738
1988	941.1000069155
1989	956.3999935166001
1990	739.9000068081999
1991	698.3000059499001
1992	755.6999919786001
1993	699.0999923719
1994	861.4000006689001
1995	735.3999911621
1996	712.2999880686
1997	731.4000026137
1998	685.6999913006
1999	670.4999959618999
2000	600.721
2001	568.7970000953674
2002	403.404
2003	365.64799999999997
2004	432.351
2005	479.59200000000004
2006	490.351
2007	443.22700000000003
2008	530.3810000000001
2009	730.325
2010	747.1341565035809
2011	904.8360159991792
2012	1096.2602956853652
2013	1089.3989501811427
2014	1159.8908196364962
2015	1438.44340038029
2016	1696.183709846143
2017	2299.2996133911724
2018	2342.9683017754123
2019	2651.567743848927
2020	3006.8133288995236
2021	3890.926675487