2017
6.5
1990
7.7
2010
6.7
2015
7.0
2017
6.6
2017
6.7
2017
7.1
2007
6.8
2016
6.5
2017
7.3
1997
7.5
2017
5.6
2017
6.5
2017
6.7
2017
6.9
2017
6.7
2013
6.6
1998
8.5
2013
4.8
2003
7.3
2008
6.6
2015
6.3
2014
6.0
2003
7.5
2014
6.7
2006
6.9
2011
7.1
2015
6.4