1964

6.0

1985

8.4

1984

7.0

1979

4.6

1972

6.3

1952

6.7

1981

6.5

0.0

1997

7.5

1976

7.0

2000

0.0

2005

0.0

1981

0.0

1969

5.5

1955

6.1

2006

4.0

1972

0.0

1982

4.5

1977

9.5

2006

6.2