Year	Percent
1990	5.62
1991	5.85
1992	5.91
1993	5.92
1994	4.97
1995	3.69
1996	2.17
1997	1.61
1998	1.53
1999	1.53
2000	1.76
2001	1.19
2002	1.35
2003	1.6
2004	1.67
2005	1.51
2006	1.55
2007	1.86
2008	1.91
2009	1.91
2010	1.93
2011	2.15
2012	2.17
2013	2.01
2014	1.86
2015	2.06
2016	2.43
2017	2.69
2018	3.25
2019	4.14