2015

7.1

2010

8.1

2004

8.6

2008

8.9

2014

7.8

2011

8.5

1989

8.0

2019

8.0

2011

8.1

2019

8.3

2013

8.7

2019

8.7

2012

6.8

2005

8.2

2015

8.2

2015

8.2

2007

7.9

2011

8.3

1987

8.4

2017

8.7