Year	million ton-km
1995	4170
1996	4730
1997	4980
1998	4960
1999	5141
2000	4997
2006	4390
2007	4405
2008	5452
2010	7166
2014	9884
2015	10057
2016	11120
2017	13396
2018	15091
2019	15573