1984

5.9

1982

5.5

2006

7.8

2008

6.3

2007

4.8

2017

6.6

1932

6.0

1988

8.0

1990

7.7

2016

3.5

2007

6.8

2004

5.6

1964

6.2

2006

6.7

1997

6.1

1973

7.5

2007

5.0

1968

7.6

1976

6.2

1962

4.8