1997

5.5

1979

3.5

1980

5.7

2005

5.5

1992

4.7

1985

6.7

1982

4.8

1991

4.6

1968

7.1

1991

5.3

1996

6.1

1982

7.5

1971

5.3

1974

0.0

1980

7.3

1975

7.4

1972

3.3

1966

7.6

1978

6.0

1982

6.6

1996

5.3

1987

3.4

1984

6.3

1976

6.0

1991

5.0

1996

7.2

2006

6.5

1994

6.1

1983

7.5

1980

5.6

2023

6.0

1968

6.7

2000

5.2

1977

5.9

1996

5.4

2011

5.6

1983

6.2

1986

5.9

1992

6.2

1999

5.1

1982

5.5

1995

4.6

1989

6.7

1992

6.3

1982

6.6

1994

5.6