Year	million ton-km
1995	2355.5
1996	2659
1997	2818
1998	2865.5
1999	3337.5
2000	3912
2001	4251.5
2002	4188
2003	4583.5
2004	4449.5
2005	3938.5
2006	4893
2007	5837
2008	5452
2009	6512.5
2010	4736.5
2011	6054.8
2014	6377.2495
2015	5479.2605
2016	4634.3779585
2017	4282
2019	3821.8