Years | Beijing | China | The United States | Developed countries |
2006 | −0.228 | 0.849 | 0.097 | −0.188 |
2007 | −0.227 | 0.827 | 0.031 | −0.185 |
2008 | −0.269 | 0.827 | 0.015 | −0.165 |
2009 | −0.418 | 0.808 | 0.130 | −0.176 |
2010 | −0.452 | 0.819 | 0.052 | −0.185 |
2011 | −0.392 | 0.821 | 0.067 | −0.173 |
2012 | −0.482 | 0.828 | 0.078 | −0.186 |