2010

8.0

2009

7.7

1963

7.8

2014

7.3

2015

8.7

1969

7.3

2015

8.0

2017

7.1

1996

7.4

1997

8.3

2002

6.9

1990

8.1

2005

8.3

1976

7.5

1980

7.3

2003

7.5

2012

6.3

1989

8.2

2014

7.2

2013

7.5