Year	Percent
1990	0
1995	1.36213
1996	1.42808
1997	1.41855
1998	1.40856
1999	42.80332
2000	48.7995
2001	50.34167
2002	50.83484
2003	50.00345
2004	50.56634
2005	50.25956
2006	50.20866
2007	50.36482
2008	54.52
2009	54.21
2011	49.6