1995

4.2

2007

7.7

1993

7.5

1994

7.8

1994

8.5

2002

4.6

2006

7.5

1988

0.0

2004

7.9

1986

7.3

2009

7.5

2007

8.0

1992

6.7

1995

0.0

1983

6.3

2011

5.0

2005

7.9

1988

0.0

1988

10.0

1999

6.3

1999

0.0

2011

6.9