1998

7.7

1994

8.7

2016

7.6

2019

8.5

2013

8.0

2017

7.6

2016

8.2

2014

7.9

2019

6.8

2012

7.7

2014

8.5

2010

7.7

2016

7.6

2018

7.3

2021

7.1

2005

8.1

2011

7.0

2018

7.4

2016

6.8

2015

6.8