1990

7.6

2017

8.2

2021

7.8

2011

8.5

2013

8.7

2017

8.4

2016

8.5

2012

7.5

2009

8.0

2004

8.6

2016

8.6

2008

8.9

2015

8.1

2019

8.4

2014

7.8

2019

8.5

2015

8.2

2017

8.5

2016

8.0

1994

8.4