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