Year	%
1997	17.4545454545455
1998	17.4545454545455
1999	16.3636363636364
2001	22.2627737226277
2002	22.2627737226277
2003	21.3559322033898
2004	21.3559322033898
2005	30.4075235109718
2006	30.4075235109718
2007	30.4075235109718
2008	30.4075235109718
2009	30.6501547987616
2011	36
2012	36
2013	36
2014	36
2015	36
2016	36.5591397849462
2017	37.1794871794872
2018	37.1794871794872
2019	36.8956743002545
2020	36.71875
2021	36.8556701030928
2022	36.8556701030928
2023	37.4045801526718