The columns of the table below represent the countries and the rows represent the time periods.
| Time period | Mexico | China | United States | India | Chile | South Africa | France |
| 2004 | 9% | 24% | 12% | 32% | 9% | 8% | 7% |
| 2006 | 8% | 23% | 11% | 28% | 9% | 8% | 6% |
| 2008 | 8% | 22% | 15% | 25.5% | 9% | 8% | 7% |
| 2010 | 8.5% | 19% | 15% | 25% | 9% | 7% | 8.5% |
| 2012 | 9% | 17% | 15% | 25% | 8.5% | 6% | 7% |
| 2014 | 8.5% | 16% | 14% | 24.5% | 7% | 5% | 7% |