2010

6.6

2000

6.3

2006

6.3

2006

5.1

2024

7.1

1970

6.0

1994

8.0

1990

6.0

2021

7.2

2005

5.7

1956

6.2

2008

6.5

1990

7.3

1961

6.9

1988

7.6

1967

6.8

1995

7.7

1989

5.9

1983

7.0

1974

6.6