Year	Percent
1994	25.56071
1995	17.95407
1996	9.85031
1997	10.69388
1998	12.67926
1999	12.73353
2008	16.42118
2009	14.10671
2010	12.15778
2011	12.22476
2012	12.77864
2013	13.38833
2014	14.21254
2015	15.60316