1979

6.0

1993

5.7

1994

6.6

1973

6.9

1978

0.0

1980

6.5

1976

6.3

1998

7.2

1983

6.4

1985

7.3

1981

0.0

2010

8.0

1995

6.8

1983

4.5

1992

8.2

1981

5.0