Year	Percent
1990	3.28537
1991	2.72229
1992	2.5183
1993	1.34594
1994	2.09755
1995	3.61369
1996	3.7129
1997	3.72001
1998	3.78487
1999	3.26053
2000	3.28984
2001	3.19043
2002	3.01717
2003	2.55794
2004	2.53445
2005	2.58921
2006	2.22577
2007	2.18486
2008	2.15113
2009	1.91544
2010	1.91779
2011	1.42319
2012	1.41816
2013	1.40642
2014	1.40863
2015	1.41894
2016	0.95851
2017	0.92145
2018	1.10681
2019	1.09084
2020	1.1172