1968

6.9

1948

7.9

1990

6.3

1976

7.0

1950

8.0

1934

6.5

1957

8.3

2010

7.8

1962

7.7

1971

7.2

2002

7.5

1962

7.5

1953

6.6

1952

7.5

2007

6.9

1974

7.0

2010

6.2

2001

6.0

1969

7.3

1964

7.1