2006

9.3

1979

7.4

2004

8.3

1993

6.6

1975

8.3

1985

7.9

1996

5.4

1984

8.5

2011

7.8

2012

7.4

2009

7.2

2010

7.5

1973

7.6

1976

7.9

2006

8.2

1996

8.1

1997

7.1

2004

8.6

2010

7.7

2014

7.2