2007

7.5

2004

8.1

2011

8.2

1990

6.9

2018

8.3

2001

7.8

2009

6.8

1987

8.4

2007

7.6

1995

7.8

2010

6.8

2014

7.9

2005

7.1

2008

7.9

2007

7.6

2016

8.6

1994

8.0

2012

6.7

1982

7.1

2004

7.7