Year	%
1996	51.27286
1999	42.61983
2000	42.42256
2001	42.84314
2002	42.37389
2003	44.76202
2006	39.37199
2007	44.72761
2008	44.32971
2009	42.61197
2010	45.10028
2011	44.43373
2012	38.76928
2013	38.76928
2014	43.92117
2015	43.92117
2016	43.92117
2017	41.70011
2018	35.39897
2019	35.37291
2020	30.08636