Year	million ton-km
1970	96.69999849790001
1971	93.6000017226
1972	80.5
1973	111.99999839070001
1974	136.4000018836
1975	171.30000305180002
1976	189.8000055328
1977	206.6000054851
1978	254.40000420069998
1979	274.4999967143
1980	323.6999948546
1981	356.0999988689
1982	362.2000064029
1983	378.7000054494
1984	434.40000558649996
1985	470.8999904246001
1986	472.2000007779
1987	560.299995616
1988	630.2999889404
1989	621.6000120192
1990	613.3000024109
1991	593.0999877827
1992	666.100007072
1993	686.5999908594999
1994	759.6000061185001
1995	809.6999929325
1996	793.9000057355001
1997	723.7000190989002
1998	786.1999864653001
1999	799.9999836236
2000	837.0749999999999
2001	879.678
2002	703.2650000000001
2003	693.35
2004	831.251
2005	904.077
2006	964.051
2007	848.2850000000001
2008	849.324
2009	775.633
2010	900.9297330113562
2011	807.65308933043
2012	801.9458410538118
2013	802.3102373715799
2014	695.1303537820602
2015	674.102212950681
2016	691.369860034243
2017	779.6753153645385
2018	765.1033763536491
2019	730.1478498199724
2020	294.3544436
2021	462.42123228