2009

8.0

2011

5.1

2012

6.9

2014

5.7

1986

6.5

2012

6.0

2005

7.2

2008

5.2

1995

5.9

1952

8.3

1976

7.5

2004

6.7

2017

7.5

2008

6.8

1987

7.5

2016

4.0

2011

6.7

2000

6.3

1997

8.4

2006

5.5