1992

6.8

1986

4.8

1987

5.9

1972

4.5

2004

5.2

1985

4.4

1968

6.9

1988

5.3

1998

6.0

1992

3.7

1973

6.1

1981

4.6

1978

2.0

1996

0.0

1993

0.0

1975

6.2

1992

5.5

1998

0.0

2007

7.4

1979

4.0

1988

6.3

1985

5.7

1984

6.0

1991

4.5

1987

4.3

1986

5.6

1990

5.1

1992

4.4

1990

5.0

1991

4.3

1977

5.6

1985

5.3

1993

7.0

1974

4.8