2014

7.1

2020

6.9

2012

7.0

2017

6.5

2017

7.3

2004

7.8

2016

6.4

1972

6.2

2017

6.2

2014

7.6

2015

5.2

2016

5.8

2010

7.7

2001

6.9

2009

7.6

2017

6.1

2007

6.4

2014

7.0

2001

7.8

2016

7.1