2015

5.8

2002

7.5

2014

5.7

2013

6.6

2011

6.7

1999

8.0

2016

6.7

2013

6.0

1996

6.4

2014

7.4

2015

6.2

2009

4.6

2013

6.1

2017

6.9

1965

7.1

2015

7.2

2015

7.4

2016

6.5

2007

6.6