Year	Percent
1986	14.36
1987	20.71
1995	6.06
2008	5.7
2009	5.3
2011	5.26
2012	3.4
2013	5.59
2014	4.76
2015	6.97
2016	6.81
2017	6.7
2018	6.88
2019	8.83
2020	16.07