1979

6.9

1974

6.7

2004

6.9

2006

6.2

1976

8.1

1998

7.3

1987

7.8

1932

6.9

1953

7.3

1931

8.1

2005

6.2

2006

6.3

2005

5.8

2003

6.6

2016

6.4

1956

4.6

2006

8.0

2003

7.8

1954

7.9

2005

6.3