1985

0.0

1962

7.0

1973

1.0

2004

7.9

1977

7.1

1997

8.4

1980

5.0

1989

0.0

1979

6.9

1979

7.4

1987

7.6

2001

7.1

2006

6.7

2006

4.9

1996

6.2

2005

7.7

1970

7.5

1949

7.0

1976

9.0

1976

6.6