1994

8.4

1973

7.0

1999

7.0

1980

7.3

1963

5.7

2009

7.9

1969

6.7

2008

7.8

1987

5.5

2008

7.7

2015

7.2

2011

8.5

2004

8.0

2017

7.0

2009

7.9

2020

7.5

2016

6.9

2010

8.0

2012

6.7

1994

6.8