Year	Percent
1978	4.23509
1979	4.8015
1993	20.31371
1994	25.09352
1998	40.77206
1999	44.84738
2000	46.05197
2001	46.92758
2006	71.5547
2008	81.41317
2009	84.42752
2010	92.67871
2011	91.18557
2012	99.95912
2013	97.58487
2014	100.56015
2016	102.70232