Year	Percent
1993	1.51309
1994	5.78785
1995	5.53422
1996	6.53141
1997	5.87189
1998	3.8724
1999	-0.30686
2000	1.34728
2001	3.50572
2002	4.5608
2003	5.48813
2004	5.28027
2005	6.74049
2006	8.4479
2007	10.76725
2008	5.53923
2009	-5.54849
2010	4.94387
2011	2.68661
2012	1.48429
2013	1.38165
2014	2.65067
2015	3.75145
2016	3.19157
2017	3.22731