1976

4.6

1984

7.2

1995

7.3

1979

6.7

1991

0.0

1972

7.9

1987

7.7

1985

6.5

1987

6.0

1987

7.0

1989

8.0

1994

6.0

1993

4.3

1985

7.5

1982

4.5

1996

7.1

1991

0.0

1991

4.5