Year	Percent
1995	5.20565
1996	6.61167
1997	9.11925
1998	8.91559
1999	14.29098
2000	26.72231
2001	29.21306
2002	31.06214
2003	40.11162
2004	40.08622
2005	48.84149
2006	71.62485
2007	101.77227
2008	90.37207
2009	50.29291
2010	27.76428
2011	25.12535
2012	41.5308
2013	39.56104
2014	47.20344
2015	36.29861
2016	42.00833