Year	million ton-km
1970	127.4999979809
1971	138.7999999601
1972	150.50000255560002
1973	213.09999775140002
1974	261.3000076339
1975	270.8000021505
1976	304.200004153
1977	326.2000020295
1978	391.10000727330004
1979	462.2000007705999
1980	454.3999967502
1981	516.0999968799
1982	528.3000108300998
1983	613.5999866650999
1984	682.6999922917998
1985	664.4999902995
1986	608.1000158712001
1987	694.2000133099
1988	701.5999988020999
1989	695.3000008686001
1990	652.4999981448
1991	618.8000042289999
1992	764.6000094934
1993	850.6999935808001
1994	894.1000067145001
1995	887.2999949828002
1996	968.1999940201001
1997	1093.2999872492
1998	1150.7999711559
1999	1392.6000193355999
2000	1442.2640000000001
2001	1490.063000095367
2002	1373.7180000000003
2003	1534.5829999999999
2004	1713.3960000000002
2005	1732.591
2006	2118.846
2007	1817.78
2008	1678.5410000000002
2009	1713.1879999999999
2010	2052.237887172
2011	2138.537709448908
2012	2485.7762626292842
2013	2642.201981989186
2014	2722.6132718844683
2015	2739.3669392347424
2016	2870.6468391337503
2017	3607.123877610263
2018	3526.787055135997
2019	3732.4312292674076
2020	3296.1668181651644
2021	4266.475686440999