2004

6.8

2006

6.4

2000

7.4

2020

9.0

2006

4.7

2005

6.2

1976

3.6

1996

6.6

2015

0.0

1999

4.9

2007

4.9

2004

4.1

1998

5.1

2009

5.7

2014

6.4

2008

5.2

2008

4.8

2003

6.8

1965

5.6

2008

5.2