2012

4.8

1992

7.5

2011

8.3

2003

5.2

2005

7.0

1995

7.2

2004

3.8

1998

5.6

2008

5.9

2002

7.7

0.0

2001

5.2

1999

0.0

2000

6.0

1995

7.2

2003

5.7

2015

7.0