Year	million ton-km
1974	1325.1999913007999
1975	1491.1999902874
1976	1727.7000164912001
1977	1833.4999913724002
1978	2016.9999692590002
1979	2196.8000304698
1980	2295.6999890802995
1981	2466.2000325916993
1982	2724.600033119701
1983	2920.799963534001
1984	3311.6000566629
1985	3230.6000213475
1986	3447.5000098347
1987	4047.3999882341
1988	4477.199996292801
1989	4809.5000053048
1990	5138.3000259995
1991	5729.999941646802
1992	6682.0000765472005
1993	8171.300117999199
1994	9212.799866296798
1995	10034.500114731598
1996	10434.099942251798
1997	12267.400079503599
1998	12682.699911937401
1999	13733.099871799297
2000	15890.619999999999
2001	15699.609999999999
2002	17266.838
2003	18993.573000000004
2004	22970.632999999998
2005	24789.263999999996
2006	26363.438000000006
2007	31258.212
2008	35760.026
2009	37854.25
2010	44828.07576385071
2011	45714.257834935066
2012	46926.033379596745
2013	50908.679735262485
2014	55736.26267422747
2015	59497.13254175519
2016	63145.25903601954
2017	68899.20546893674
2018	72680.864635143
2019	72743.71527538907
2020	58637.74494645202
2021	69403.891250063