1988

7.1

1997

5.1

2001

2.8

1981

0.0

1983

5.0

1980

7.0

1979

7.2

1993

6.1

1995

6.0

1975

6.2

1988

6.1

1983

6.5

1996

5.8

1990

6.1

1974

6.6

1978

6.1

1982

5.6

1981

6.7

1982

6.6

1989

5.9

1975

6.0

1981

6.0

1986

4.3

1995

3.2

0.0

1988

6.2

2002

5.7

1992

4.1

1986

5.7

2001

2.1

1987

5.4

1991

5.7

1987

5.9

1994

5.3

1984

8.0

1999

5.6

1982

6.2

1983

5.6

1984

6.7