1979

8.5

1995

5.3

1972

6.4

1985

5.3

1980

5.6

2002

7.1

1996

5.2

1993

5.5

1980

6.4

1994

8.4

1984

5.9

1984

6.7

1985

6.9

1986

6.2

2006

7.3

0.0

1981

0.0

1982

5.4

1986

7.3

1977

5.5

1985

7.1

1982

6.0

1999

7.5