1969

5.0

1974

6.7

1997

7.4

2009

7.8

1968

5.8

2007

7.9

2020

5.1

1968

5.7

1976

6.6

1979

6.2

2006

7.0

2007

6.0

1979

6.2

1979

0.0

1981

6.0

1999

8.3

1975

0.0

1976

6.7

1983

5.2

1976

0.0

1976

5.0

1979

0.0

1976

6.7

1979

7.7

1966

5.4

1981

5.8

1986

7.1

1980

4.8

1987

6.3

1998

0.0

1969

5.4

1976

6.8

1995

6.4

1991

3.5