2006

7.8

2019

6.4

2009

7.5

1964

7.0

2013

8.1

1980

7.3

2016

6.6

2009

6.6

2015

8.0

2014

8.0

1999

7.2

1976

7.3

2009

7.9

2010

6.6

2015

7.4

2017

7.0

2012

7.7

2002

7.1

1943

8.2

2013

6.6