2004

8.2

2009

7.7

2002

7.5

1990

8.0

1986

8.4

2001

6.5

2016

8.0

2014

7.8

1988

8.1

1998

7.9

2018

7.3

1999

7.9

2009

6.8

2003

7.8

2010

6.9

2004

7.5

2017

6.6

2005

8.3

2006

8.2

2006

7.5