Year	million ton-km
1997	2260.1999511719
1998	2245.5
1999	2506.1000976563
2000	3523.142
2001	3768.187
2002	4157.515
2003	4347.781
2004	4670.208
2005	5149.686
2006	5270.266
2007	5512.271
2008	5357.932
2009	8369.219
2010	4573.109
2011	4653.873
2012	4402.974
2013	5224.838626
2014	5753.111628
2015	6309.473324
2016	6877.761503
2017	7321.11217
2018	7323.03958
2019	7188.04334
2020	7344.759036
2021	8588.53476