2016

6.4

2007

6.8

2021

7.0

2006

6.0

2004

6.6

1980

5.9

1988

6.7

1992

6.3

2015

5.6

2008

5.6

1999

7.1

2018

6.2

2017

4.8

2013

0.0

1987

6.8

2016

8.5

1998

5.1

2007

5.0

2013

5.0

2014

4.0