2006

0.0

1984

7.5

1991

6.4

1977

6.0

1971

7.6

1976

7.0

1982

7.2

1993

7.1

2002

5.8

1978

7.1

1977

6.8

2005

0.0

1965

8.3

1999

7.9

1991

7.0

1975

5.9

2005

6.2

1997

6.2

1987

6.0

1998

7.0