Year	million ton-km
1970	14.5
1971	14.6999998093
1972	15.3000001907
1973	18.7000007629
1974	17.3999996185
1975	17.1000003815
1976	17.7000007629
1977	20.7000007629
1978	25
1979	22.5
1980	24.7999992371
1981	21
1982	24.5
1983	27.1000003815
1984	43.7999992371
1985	66.4000015259
1986	82.3000030518
1987	86.3000030518
1988	88.6999969482
1989	92.6999969482
1990	66.5999984741
1991	68.4000015259
1992	94.4000015259
1993	92.5
1994	110.3000030518
1995	114.6999969482
1996	118.0999984741
1997	137.3999938965
1998	126.6999969482
1999	101.5
2000	78.254
2001	79.223
2002	83.493
2003	93.469
2004	117.155
2005	132.601
2006	157.184
2007	160.322
2008	227.762
2009	424.472
2010	407.062
2011	505.565
2012	703.644
2013	790.74339
2014	950.1573
2015	1228.73832
2016	1500.14753
2017	2076.18502
2018	2089.27754
2019	2450.27296
2020	2897.1341
2021	3716.82165