1978

5.7

2008

6.6

1947

6.4

2006

5.5

1973

7.5

1986

6.3

2008

6.7

2005

7.0

1984

7.8

1931

4.5

2003

6.6

2004

7.5

1990

6.5

1964

7.2

1932

5.0

1974

7.1

1992

5.6

2010

6.0

1983

5.8

2001

7.4