2013

6.7

2006

3.2

2005

6.9

2016

6.1

2017

6.0

2009

5.8

2016

6.5

2016

6.7

2005

5.2

1967

6.1

1948

6.3

2006

6.1

2001

4.7

2018

5.1

1980

6.6

2007

6.6

1958

5.5

2000

5.0

2017

6.1

2017

6.5