| 2015 | 2050 | |||
| China | 1.4 | ....... | India | 1.7 |
| India | 1.3 | China | 1.3 | |
| U.S.A. | .33 | U.S.A. | .44 | |
| Indonesia | .25 | Indonesia | .30 | |
| Brazil | .21 | Ethiopia | .28 | |
| Pakistan | .19 | Pakistan | .28 | |
| Bangladesh | .17 | Nigeria | .26 | |
| Nigeria | .16 | Brazil | .26 | |
| Russia | .14 | Bangladesh | .23 | |
| Japan | .13 | Congo | .19 | |
| Mexico | .12 | |||
| Ethiopia | .10 | |||
| Philippines | .10 | |||
| Vietnam | .09 | |||
| Egypt | .09 | |||
| Turkey | .08 | |||
| Germany | .08 | |||
| Iran | .08 | |||
| Congo | .08 | |||
| Thailand | .07 | |||
| France | .06 | |||
| U.K. | .06 | |||
| Italy | .06 | |||
| Burma | .06 | |||
| Columbia | .05 |