1987

8.0

2013

8.5

2007

7.9

2019

8.7

2013

8.7

2016

8.6

1989

8.0

2010

8.1

2008

8.9

2021

7.6

2002

8.3

1994

8.4

2014

7.8

2022

8.0

2017

8.2

2005

8.2

2018

7.7

2019

8.5

2018

8.0

2005

8.7