Year	million ton-km
2000	21.899
2001	22.616
2002	30.455
2003	45.973
2004	106.863
2005	169.805
2006	180.83
2007	185.079
2008	98.06
2009	32.116
2010	36.71379
2011	25.09099
2012	19.06999
2013	20.07111
2014	23.87158
2015	25.435
2016	29.39461
2017	32.76585
2018	31.84376
2019	26.02953
2020	8.99441
2021	1.10174