2012

7.4

2006

7.5

1993

8.0

2015

7.4

2017

7.7

2016

7.3

1977

7.6

2011

8.3

2006

8.1

2009

8.7

2007

7.2

2010

7.1

2003

8.0

2010

8.0

2017

8.6

2016

7.3

2010

7.0

2005

6.8

2016

6.4

2010

8.1