Year	%
1997	13.0434782608696
1998	13.0434782608696
1999	13.0434782608696
2000	13.0434782608696
2001	20.2173913043478
2002	20.2173913043478
2003	20.2173913043478
2004	20.2173913043478
2005	20.4347826086957
2006	20.4347826086957
2007	20.4347826086957
2008	20.2173913043478
2009	20
2010	20
2011	23.695652173913
2012	23.695652173913
2013	23.695652173913
2014	24.3478260869565
2015	27.3913043478261
2016	27.3913043478261
2017	28.0434782608696
2018	28.0434782608696
2019	28.695652173913
2020	28.695652173913
2021	28.322440087146
2022	28.2608695652174
2023	29.3478260869565