2011

8.1

1995

6.4

1979

7.3

2020

7.0

2000

6.3

1988

6.6

1967

6.8

1983

7.9

1975

7.8

2006

5.7

1977

6.7

1976

7.3

2010

6.2

1988

5.2

1978

6.6

2001

6.9

2021

7.4

2008

7.1

1954

8.3