2015

5.3

2013

6.9

2007

7.3

2009

6.5

2006

6.3

2020

6.8

2017

5.6

2005

6.8

2013

6.9

2001

6.9

2019

6.5

2015

6.5

2008

6.1

2016

6.0

1965

7.1

2000

6.2

2015

6.4

2016

7.2

2014

5.4

2012

5.8