2018

8.0

2010

8.0

2017

5.7

2005

8.2

2009

8.3

1979

6.8

1990

7.6

2013

7.6

1996

7.8

1992

8.2

2020

7.4

2016

8.4

1998

7.2

1999

7.0

2007

8.5

2015

8.0

2021

8.2

2017

8.1

2014

7.9

1999

7.4