1979

8.3

1930

7.7

1986

7.7

1987

7.5

1967

7.6

2000

6.5

1977

7.2

2006

6.7

2000

7.2

1953

7.7

2001

6.4

1945

6.4

1960

6.9

2003

6.3

1969

7.9

2001

7.3

1987

7.2

1944

7.4

1964

6.1

1965

7.1