Rank
Country
Y2012
(MT)
Y2013
Y2014
Y2015
Y2016
Y2017
World Total
2,465
2,404
2,699
3,036
2,894
2,500
1
USA
-
977
1,843
2,208
1,921
1,489
2
China
1,037
871
856
828
973
1,061
3
Philippines
1,428
557
4
Japan