Year	Percent
1986	19.97
1987	20.86
1995	2.9
2008	2.04
2009	2.61
2011	1.61
2012	1.97
2013	2.14
2014	1.56
2015	2.71
2016	3.29
2017	3.58
2018	3.34
2019	3.38
2020	7.3