2007

9.5

2004

7.5

2016

7.1

1999

7.9

6.5

1976

7.8

2006

7.3

2006

7.7

1997

6.4

2019

8.5

1988

7.5

2003

8.2

1983

8.0

2003

7.8

2012

7.2

2000

6.7

1996

6.8

1999

5.8

1971

8.1

2012

7.3