Year	Percent
1996	3.89148
1997	4.37016
1998	5.1009
1999	4.37867
2000	5.22724
2001	4.59693
2002	4.86131
2003	6.91832
2004	6.297
2005	3.72453
2006	3.39754
2007	3.65383
2008	3.28703
2009	5.55074
2010	4.33627
2011	4.39242
2012	6.30184
2013	5.89495
2014	6.51216
2015	7.26842