2007

7.1

2020

5.4

2009

6.5

1996

6.9

1980

7.5

2000

3.5

2010

5.6

2010

6.3

1986

0.0

2004

0.0

2006

4.8

2005

7.8

1999

6.0

1994

0.0

2005

3.4

1997

6.7

2003

7.3

2008

0.0

2014

6.8