1968

6.8

1963

7.9

1965

6.3

1971

7.5

1964

7.3

1964

7.3

1966

7.8

1967

8.4

1974

5.0

1967

4.9

1966

7.4

1965

5.7

1965

5.7

2018

3.7

1969

0.0

1973

5.2