1987

7.1

1984

4.1

1985

5.9

1982

7.6

1989

6.9

1971

8.1

1988

5.8

1993

5.5

1987

0.0

1991

6.6

2002

6.7

1997

4.4

1992

5.9

1985

7.5

1984

7.5

1989

5.9

1980

6.5

1994

5.6

1982

6.2

2001

6.3

1990

7.9

1983

0.0

1984

5.7

1990

6.2