Year	Percent
1994	29.26
1998	50.89
1999	54.91
2000	5.47
2001	5.07
2002	52.47
2003	52.48
2004	56.1
2005	55.69
2006	55.34
2007	51.82
2008	48.6
2009	49.82
2010	48.49
2011	49.45
2012	47.32