2000

7.8

2011

5.1

2014

5.2

2011

2.0

2002

0.0

1997

5.6

2003

6.0

1994

1.0

2006

1.0

2008

7.4

2000

4.1

2012

6.2

2005

7.5

2012

6.7

1999

5.9

1970

6.2

2003

6.0

2013

6.1

2013

0.0

2003

3.7

2016

3.5