1979

7.3

2012

6.9

2014

7.7

2002

5.6

2009

6.1

2007

7.0

2014

5.6

2003

6.3

2026

0.0

2006

4.6

2014

6.3

1968

6.4

2001

5.9

2017

5.7

2012

5.5

2005

6.5

2021

6.3

2014

7.0

2010

4.6

2003

6.1