Year	Percent
1993	15.57791
1994	13.44849
1995	9.89107
1996	4.45145
1997	4.86272
1998	4.99675
1999	7.28403
2000	9.37318
2001	5.08828
2002	3.95239
2003	5.35476
2004	5.78177
2005	2.44092
2006	2.91904
2007	1.12915
2008	2.8346
2009	-1.16487
2010	0.4853
2011	1.64768
2012	1.26176
2013	0.51853
2014	-0.16009
2015	-0.15288
2016	-0.44841
2017	1.27734