1997

7.2

2011

4.8

1989

6.9

1995

0.0

2000

7.9

2010

8.0

1991

6.6

2003

5.9

2006

4.2

1996

5.5

2008

7.0

1995

5.7

1996

0.0

2003

6.9

1995

2.0

1997

6.2

2013

7.6

2008

8.4

2002

5.7