Year	million ton-km
1970	97.5999984741
1971	100.0999984741
1972	119.5999984741
1973	127.5999984741
1974	143
1975	134.3999938965
1976	154.5
1977	170.8000030518
1978	188.1000061035
1979	182.3000030518
1980	175
1981	178.3000030518
1982	173.3000030518
1983	166.1999969482
1984	173
1985	171.8000030518
1986	173.6999969482
1987	169.1999969482
1988	175
1989	185.3000030518
1990	191.1000061035
1991	186.6999969482
1992	180.3999938965
1993	192.3000030518
1994	195.8000030518
1995	192
1996	249.6000061035
1997	293.6000061035
1998	294.200012207
1999	291
2000	289.285
2001	263.787
2002	266.838
2003	252.88
2004	256.516
2010	473
2011	495
2012	516
2013	592
2014	686
2015	594
2016	690
2017	762
2018	991
2019	985.655671715528
2020	304.418496636947
2021	348.598679007