1978

7.5

1983

5.3

2006

3.0

1996

0.0

2004

4.4

1976

6.0

1981

0.0

1966

0.0

1984

0.0

1979

6.3

1980

6.5

1994

7.1

1990

6.9

2001

0.0

1979

7.6

2007

4.7

1979

7.5

1977

7.6

1983

7.3