2012

7.2

2020

6.8

2016

7.6

2017

7.6

2019

7.3

2018

7.0

2017

7.4

2015

6.8

2015

7.7

2016

7.6

2014

8.0

2018

6.8

2013

7.2

2019

6.8

2016

7.9

2019

6.3

1997

6.5

2019

8.1

2005

7.1

2018

7.5