Year	million ton-km
1970	90.8000030518
1971	131.6000061035
1972	154.8999938965
1973	172
1974	199.5
1975	214.6999969482
1976	264.299987793
1977	324.200012207
1978	358.6000061035
1979	376.6000061035
1980	389.700012207
1981	425.8999938965
1982	448
1983	442.8999938965
1984	483.200012207
1985	522.299987793
1986	532.5999755859
1987	526.4000244141
1988	597.9000244141
1989	732.5999755859
1990	759.700012207
1991	622.799987793
1992	584.5999755859
1993	553.799987793
1994	580.9000244141
1995	689.5999755859
1996	739.5999755859
1997	740.200012207
1998	767.0999755859
1999	816
2000	879.499
2001	878.871
2002	807.417
2003	872.739
2004	1043.562
2005	1021.743
2006	1100.205
2007	1203.877
2008	1306.438
2009	1079.589
2010	1235.86488460144
2011	1313.29316795807
2012	1131.85052008716
2013	957.997754181
2014	962.636446
2015	1035.487113
2016	1068.160640636
2017	1078.63356
2018	1118.73285
2019	1191.466578
2020	494.260587847
2021	850.819356