Year	million ton-km
1974	2358.6999970746997
1975	2693.799997755099
1976	3152.300027505
1977	3466.1999870987997
1978	3830.1000004712005
1979	4098.700033374401
1980	4525.799977011798
1981	5005.900006301699
1982	5278.100036092002
1983	5611.499963648502
1984	6268.300048657199
1985	6218.300028577501
1986	6509.400056474099
1987	7461.8000250386995
1988	8011.599976085006
1989	8371.100014291706
1990	8725.800063326606
1991	8878.599931597602
1992	9844.600079632703
1993	11382.000077583092
1994	12930.599908225195
1995	13562.7000987009
1996	13910.199997744894
1997	15879.5000580773
1998	15649.173828224102
1999	16560.418930220894
2000	18627.697000000004
2001	18122.92300009537
2002	18860.47300000001
2003	20230.393000000004
2004	23565.767999999993
2005	24416.50999999999
2006	25504.911000000004
2007	28655.998000000018
2008	30033.779999999995
2009	32206.222999999987
2010	40166.45736127571
2011	40147.94337762524
2012	39803.68681641631
2013	41697.299386573024
2014	44664.80234953252
2015	46345.74631736012
2016	49241.230916966495
2017	55754.8651449556
2018	59885.63393720064
2019	61404.68474568146
2020	46590.46166511918
2021	56117.828558989015