1985

8.5

1992

0.0

1996

6.9

1991

6.6

1971

4.2

1995

0.0

1980

7.5

1969

7.0

1969

5.4

1971

7.4

2004

5.8

1970

6.0

1989

5.6

2001

4.0

1977

7.0

1970

6.5

1999

7.1

1972

6.1

2005

5.0

1978

5.0

1981

0.0