2001

5.8

1999

6.4

2012

0.0

2011

3.9

2016

0.0

2000

5.2

2018

6.3

1998

0.0

2003

6.2

2012

7.2

2013

6.1

1992

7.7

2014

1.0

2013

6.3

2002

5.9

2005

5.8

2001

5.0

2006

1.8