2005

7.5

1996

6.2

2004

7.6

2002

7.6

2009

0.0

1986

0.0

1986

8.0

1988

6.6

1994

7.7

1970

6.8

1977

0.0

1996

6.0

1996

7.0

1991

7.5

1994

0.0

2004

4.8