1982

7.7

1987

6.2

1970

5.1

1975

5.4

1979

7.0

1975

0.0

1967

6.5

1988

4.5

2013

5.5

1973

7.0

1991

8.0

1988

7.0

1976

0.0

1993

3.9

1974

6.0

2005

6.2

1998

0.0

1998

0.0