1996

7.9

1971

7.3

2000

7.5

2006

5.5

1959

8.0

1940

7.1

1984

8.0

1950

7.0

1976

7.3

1997

6.5

1972

7.5

1946

7.8

2003

6.2

1975

8.0

2013

7.2

1999

6.6

1966

8.2

1944

8.1

1957

8.3

1998

6.2