2004

8.1

2012

7.0

1998

7.2

2004

5.7

2008

6.2

2010

8.0

1995

6.4

2003

8.0

2010

7.1

2016

7.0

1993

7.1

2003

8.0

2011

8.3

2009

7.7

1993

6.6

1977

7.4

1981

6.5

1996

7.5

2017

6.5

1976

7.9