1988

8.0

2008

7.6

2005

8.6

2016

7.8

2019

8.7

2001

7.8

2017

8.1

2014

8.2

2015

6.2

2017

8.0

2003

8.1

1995

7.0

1999

8.4

2003

5.5

2013

7.5

1997

8.3

2005

8.3

1985

7.7

1998

7.1

1986

8.4