Year	million ton-km
1970	180.90000639099998
1971	246.2000027671
1972	324.60000453140003
1973	450.10001132639997
1974	494.39998731770004
1975	585.699994281
1976	751.7000049651
1977	767.7000083922001
1978	777.2999994531999
1979	840.3000213876002
1980	790.5999725609
1981	790.4999941140001
1982	833.3999913334001
1983	1016.299974501
1984	946.9000062047999
1985	712.9000081123
1986	600.6999977230001
1987	805.8000114561
1988	925.6000133157
1989	896.3000103013
1990	795.2000070586998
1991	674.9000006690002
1992	622.1999938486
1993	632.1999977231001
1994	736.4999998211999
1995	784.0000180303999
1996	801.3000038265001
1997	845.0000045895
1998	807.3000066877
1999	804.9000023005999
2000	790.1589999999998
2001	798.506
2002	740.9229999999999
2003	817.547
2004	853.0480000000002
2005	895.0300000000001
2006	909.119
2007	795.717
2008	635.895
2009	652.522
2010	882.8153108769569
2011	758.3110368968431
2012	752.6764172493193
2013	804.6826803506858
2014	843.6721222016056
2015	785.4178803910743
2016	789.17317832787
2017	1073.553599577288
2018	999.2625546216924
2019	982.6512954694259
2020	808.099933565
2021	1084.983799328