Year	Percent
1990	0.58509
1991	1.0972
1992	1.76876
1993	1.97461
1994	2.2321
1995	2.75965
1996	3.27525
1997	16.36936
1998	30.81324
1999	40.78378
2000	46.75612
2001	52.68927
2005	63
2006	66
2007	69.45
2008	71.67
2009	74.25
2010	76
2011	79.4877
2012	79
2013	83.4535
2014	84
2015	84.56052
2016	88.23866
2017	86.54472