Year	Percent
1989	8.85
1994	0.93
1999	7.84
2000	7.4
2001	7.87
2002	7.11
2003	8.72
2004	3.56
2005	6.32
2006	6.91
2007	5.45
2008	4.41
2009	4.59
2010	5.84
2011	4.29
2012	4.34
2013	3.77