Year	Percent
1993	3.7432
1995	5.35772
1996	6.73602
1997	6.55262
1998	9.60748
1999	16.261
2003	3.02683
2004	8.40971
2005	7.56931
2006	8.31758
2007	8.1582
2008	6.22394
2009	4.80486
2010	3.87704
2011	3.54549
2016	5.1266
2017	5.27679