1996

6.4

2002

4.9

1989

5.9

2004

6.6

2009

5.2

2016

0.0

2005

7.0

2000

8.5

2007

7.8

2000

7.1

1998

8.0

2003

7.2

2010

7.5

2010

6.5

2009

1.0