Year	million ton-km
1970	208.999999985
1971	236.9999998659
1972	255.60000327250003
1973	324.99999865869995
1974	401.70000832499994
1975	417.10000438280014
1976	465.2000038478001
1977	480.8000032977001
1978	556.5000079128
1979	654.3000016738001
1980	706.0999998823002
1981	810.799996704
1982	846.5000111682998
1983	921.1999862046001
1984	987.5999888332001
1985	984.8999906555
1986	892.2000204773001
1987	976.6000098812999
1988	972.7999965176
1989	958.600003168
1990	912.4000026135002
1991	867.0000064153
1992	971.9000091180999
1993	1066.0999939667001
1994	1115.8000051827003
1995	1124.8999989701997
1996	1229.5999907922999
1997	1343.1999882161
1998	1416.9999707862999
1999	1659.3000172377
2000	1711.5920000000003
2001	1684.2540000953675
2002	1499.872
2003	1642.8689999999997
2004	1822.4060000000002
2005	1842.2219999999998
2006	2248.583
2007	1934.4270000000001
2008	1792.1149999999998
2009	1815.107
2010	2138.231378762808
2011	2215.8004779742587
2012	2559.1714223938457
2013	2708.035174170329
2014	2793.4314638692053
2015	2782.2532493577323
2016	2910.2508198198125
2017	3648.453075192791
2018	3566.4502838067738
2019	3764.726278470809
2020	3317.409369165164
2021	4294.639025181999