1984

8.5

2012

7.0

2004

8.0

2019

9.3

2011

7.3

2017

6.0

2005

7.6

1995

7.3

2012

8.1

2000

7.4

1993

7.3

2008

7.4

2009

7.5

2006

8.1

1990

7.6

2011

7.2

2015

7.8

2010

7.6

2003

8.5

2019

8.5