1990

6.0

2014

6.9

2016

5.5

1998

6.0

2003

6.0

2009

7.0

2011

5.4

2015

5.9

2016

0.0

1999

6.1

2004

4.3

2013

7.0

2006

8.0

2015

6.8

2012

7.0