2007

10.0

2016

6.7

2011

6.5

2012

6.4

2010

5.9

1988

9.2

2018

5.6

2014

7.1

2013

6.1

1896

5.2

2012

5.4

5.4

2019

4.3

2018

6.0

2015

5.8