1.0%
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
07
08
09
10
11
12
13
14
15
16
17
18
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018