1967

4.6

1969

5.6

1965

6.3

1972

4.9

2004

4.8

1968

6.4

1976

7.4

1964

6.2

1965

6.1

1966

6.1

1970

7.5

1975

6.3

2014

6.5

1990

6.5

2001

6.8

1950

0.0

2000

4.9

1952

6.2

1966

5.6

1964

6.3