2005

6.9

2014

4.7

1957

7.0

2004

5.8

1985

7.2

2008

5.0

1929

7.5

1999

6.7

1959

7.9

1978

5.9

2001

6.8

1975

10.0

1953

6.3

1935

5.0

1964

6.1

1954

7.6

2002

6.8

1996

6.9

1984

3.5

2007

6.3