1987

6.8

2002

7.7

1998

10.0

1991

6.9

1974

5.6

2008

7.3

1973

6.9

1993

7.0

1976

0.0

1983

7.6

2004

6.6

1984

7.3

1990

6.0

1980

5.9

1989

8.0

1974

6.2

1998

7.1

1979

6.0

1982

5.0