Year	Percent
1990	3.77
1994	5.64
1998	2.48
2003	3.75
2004	2.27
2008	2.36
2012	3.85
2013	4.05
2014	2.51
2015	2.98
2016	3.64
2017	3.65
2018	2.6
2019	1.91