1986

6.3

2008

4.9

2011

7.2

1981

6.8

1990

0.0

1992

7.3

1984

5.0

1991

6.0

1985

5.0

1994

7.0

1982

5.3

1998

7.0

1986

4.2

1983

7.7

1984

7.3