Year	Percent
1995	28.9478
2000	23.0951
2001	31.0144
2002	36.6296
2003	38.5214
2004	44.9574
2005	46.0573
2006	43.0646
2007	42.5203
2008	47.7627
2009	46.9379
2010	49.6287
2011	53.5421
2012	62.1584
2013	64.6678
2014	62.7818
2015	60.5784
2016	66.1742
2017	69.5596