1994

4.9

2006

7.1

2005

2.0

2001

3.5

2014

7.8

2009

4.8

1992

5.8

2002

7.9

2009

5.6

2005

7.3

2013

5.5

2018

7.1

2007

6.6

2001

0.0

1999

8.3