short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons

short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons

short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons

short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons

short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons

short tons
200M
400M
600M
800M
1B
1.2B
1980
1990
2000
2010
2020
2019-2020 projection
496M short tons
