1938

5.1

1997

6.9

1966

8.1

2005

6.7

1965

7.5

2006

6.0

2005

7.0

1990

7.7

1975

8.4

2014

4.4

2010

5.0

2016

1.0

1961

6.1

2000

6.9

2017

0.0

1970

6.5

1993

7.0

2008

6.1

1936

7.2

1971

7.0