Year	%
1996	57.22973
1999	52.78155
2000	43.21809
2001	46.92329
2002	45.89041
2003	47.04957
2006	40.71505
2007	45.1876
2008	41.55293
2009	45.84584
2010	46.95823
2011	47.64185
2012	42.42638
2013	42.42638
2014	46.01458
2015	46.01458
2016	46.01458
2017	46.09961
2018	38.04867
2019	37.93496
2020	34.7726