2007

5.4

2020

6.1

2019

6.1

2019

6.9

2015

6.4

1949

6.2

1975

6.3

2013

6.5

2011

6.8

2015

6.3

2006

6.7

2013

6.9

2011

6.1

2007

7.3

2017

6.4

2017

6.6

1998

6.9

2018

6.0

2005

5.9

2018

6.8