Year	%
1993	39.84124
1994	63.72142
1995	30.91636
1996	56.5071
1997	51.30902
1998	42.41587
1999	45.92216
2000	28.61087
2001	35.69123
2002	36.16856
2003	36.57194
2004	32.93862
2005	46.04961
2006	38.94005
2007	42.77891
2008	44.04048
2009	40.09583
2010	40.16157
2011	40.22573
2012	35.26345
2013	36.38304
2014	36.75165
2015	37.04132
2016	32.52466
2017	32.15719