Year	Percent
2002	12.54206
2003	16.94179
2004	19.32087
2005	23.4287
2006	16.9849
2007	31.91755
2008	5.64706
2009	2.90269
2010	13.36714
2011	2.35905
2012	4.00488
2013	-6.13709
2014	-6.34658
2015	-0.55777