Years

Beijing

China

Japan

The United states

The United Kingdom

2006

0.042

20.03

1.59

8.48

5.86

2007

0.039

20.05

1.76

8.74

5.9

2008

0.038

20.32

1.67

8.65

4.97

2009

0.034

20.18

1.39

8.77

4.52

2010

0.036

23.48

1.40

8.41

4.86

2011

0.035

25.65

1.28

8.53

4.98

2012

0.033

31.91

1.45

8.69

5.01