2014

7.1

1973

8.1

2009

7.4

2015

7.1

2011

6.3

2006

7.7

2003

8.0

1993

5.6

2014

8.3

2005

6.2

2011

6.7

2018

7.0

2016

8.2

2017

6.2

2015

7.4

2017

7.6

1995

6.4

2006

8.1

2013

7.1

2016

7.6