2014

8.4

2009

8.3

2007

7.6

2005

8.2

2012

7.3

2017

8.6

2020

7.5

2021

7.8

1991

7.0

2010

8.5

1995

7.3

2009

7.7

2019

7.4

2004

6.8

2007

8.2

2020

7.0

2019

8.2

2012

7.6

1989

7.6

2015

8.0