Year	Percent
1998	11.04671
1999	10.27671
2000	9.99939
2001	9.49801
2002	9.00866
2003	10.21964
2004	10.47377
2005	9.962
2006	10.36443
2007	10.20307
2008	10.48387
2009	11.4613
2010	10.77445
2011	9.31903
2012	10.75792
2013	10.50725
2014	13.14917
2015	14.3405
2016	14.28731