Year	Percent
1995	4.60688
1996	3.16517
1997	5.25486
1998	10.33493
1999	5.32895
2000	7.32027
2001	9.49372
2002	4.61938
2003	10.55277
2004	9.00974
2005	22.32813
2006	13.04073
2007	15.4204
2008	7.74261
2009	9.49275
2010	13.30261
2011	4.82756
2012	7.75929
2013	4.37061
2014	6.79129
2015	-3.16556
2016	4.02456
2017	5.9997