1968

8.3

1950

6.8

1964

6.3

1952

6.2

1999

6.9

1964

6.2

1965

6.1

1994

5.7

1965

6.2

1955

7.2

1954

5.4

1949

6.9

2003

6.3

1963

6.8

1964

6.6

2001

6.8

1953

6.5

1962

7.0

1965

6.9

1966

6.3