2015

6.4

2009

5.4

1975

4.5

2003

5.7

2014

5.9

2021

6.2

2017

6.5

2017

5.7

2014

6.5

5.0

1954

7.1

2016

7.0

2013

6.7

2004

5.7

2015

6.3

2007

5.4

2017

7.5

1994

6.8

2017

7.5

2016

7.4