2001

6.7

1993

3.6

1975

6.3

1995

4.0

1977

6.8

1978

6.8

1995

5.4

1985

5.0

1975

5.8

1996

3.0

1989

2.8

1991

5.0

1989

5.5

1984

0.0

1992

4.9

1994

4.6

1983

6.3

1997

1.3

1993

7.9

1995

7.8

1975

7.3

1992

4.5

1980

2.0

1987

5.9

1977

0.0

1985

5.4

1988

5.2

1984

6.4

1972

6.8

1978

5.0

1997

4.0

1994

7.8

1986

4.8