1992

6.8

2008

8.9

2009

8.7

2015

8.2

2014

8.6

2019

8.5

2001

7.9

2014

8.3

2013

7.4

1996

7.7

2011

8.5

2014

8.4

2005

7.7

2019

8.5

1992

8.5

2018

8.5

2016

8.5

2013

7.6

2012

8.1

2019

7.8