2006

7.4

1989

6.6

1997

6.5

1990

5.8

1994

5.0

1999

6.3

2006

7.5

2008

6.7

1991

6.1

1989

5.7

1993

5.5

2009

3.3

1995

5.8

2013

0.0

2011

0.0

2001

4.5

1992

6.3