1997

5.6

1979

3.6

1980

5.8

2005

5.5

1992

4.8

1985

6.7

1982

4.9

1991

4.6

1968

7.1

1991

5.3

1996

6.0

1982

7.5

1971

5.5

1974

0.0

1980

7.3

1975

7.4

1972

4.0

1966

7.6

1978

5.8

1982

6.7

1996

5.3

1987

3.2

1984

6.3

1976

6.0

1991

5.0

1996

7.2

2006

6.5

1994

6.1

1983

7.5

1994

5.4

1980

5.5

2023

6.0

1968

6.7

1977

5.9

2011

5.6

1983

6.2

1986

5.9

1992

6.2

1999

4.9

1982

5.5

1989

6.7

1992

6.3

1982

6.6