2010

8.0

2014

7.6

2006

8.2

2020

7.6

2016

7.3

2006

7.8

2003

8.1

1997

6.4

1993

6.4

1994

8.0

1977

7.6

2016

7.1

1993

8.0

1962

7.8

2003

8.0

2008

7.4

1982

7.5

2014

8.3

2017

6.6

2012

7.9