2018

7.1

2012

4.8

1972

4.3

1992

7.1

2017

4.6

2011

5.2

2013

0.0

2000

3.5

1988

0.0

2013

7.5

2015

0.0

2015

0.0

2015

0.0

2016

5.1

2004

7.2