1997

5.0

1970

5.5

1967

7.1

1989

6.3

1952

6.5

1959

0.0

1962

7.3

1953

7.9

1968

7.8

1972

6.4

1999

5.7

1996

7.6

1991

7.6

1961

8.0

1958

7.5

1999

7.4

2001

7.6

1998

6.6

1957

7.8