1972

8.6

1969

6.2

1992

7.5

1971

8.1

1967

5.7

1963

5.5

1982

4.9

1964

5.0

1977

6.6

1995

6.2

1990

7.5

1964

6.1

1987

6.8

1965

5.9

1979

7.2

1992

6.0

1990

7.4

1970

7.5

1975

5.1

1961

5.7