1989

8.0

2020

8.3

2016

8.6

1955

7.7

2011

7.9

2017

7.6

2016

6.9

1999

7.7

2002

8.6

2012

6.7

2005

7.6

2005

7.0

2020

7.4

2013

8.1

2015

8.3

2013

7.5

2018

8.4

2014

7.2

1999

6.9

2015

7.9