1979

8.5

1972

6.3

1985

5.3

2002

7.1

1996

6.0

1993

5.1

1980

6.4

1994

8.4

1984

5.8

1984

7.0

1985

7.0

1986

6.2

2006

7.3

0.0

1981

0.0

1986

7.3

1977

4.7

1985

7.1

1995

5.3

1982

6.0

1999

7.5