Year	million ton-km
1984	4.5999999046
1985	4.4000000954
1986	4.5
1987	4.9000000954
1988	6
1989	8.6000003815
1990	9.8999996185
1991	22
1992	30
1993	64.8000030518
1994	94.4000015259
1995	110
1996	108.0999984741
1997	120.4000015259
1998	120.4000015259
1999	148.8999938965
2000	140.231
2001	126.014
2002	161.477
2003	149.443
2004	131.441
2005	134.136
2006	130.181
2007	116.368
2008	104.195
2009	90.441
2010	148.524
2011	149.579
2012	128.234
2013	127.595004
2014	115.389
2015	115.147
2016	124.259
2017	132.612
2018	129.352
2019	122.45694
2020	40.227
2021	23.07942