2015

6.1

2003

6.0

2011

6.7

2010

6.6

2015

6.2

1957

6.9

2007

7.1

2016

7.0

2008

7.8

2017

6.5

1911

9.5

2016

5.9

2016

7.0

2021

6.4

2013

7.0

2017

6.6

2017

6.5

2010

6.4

2015

6.1

2017

6.8