Year	%
1997	3.65853658536585
1998	17.3553719008264
1999	17.3553719008264
2000	14.6341463414634
2001	14.6341463414634
2003	16
2004	16
2005	16
2006	25
2007	25
2008	25
2009	32.258064516129
2010	32.258064516129
2011	32.258064516129
2012	32.258064516129
2013	38.6861313868613
2014	41.6058394160584
2015	41.6058394160584
2016	41.6058394160584
2017	37.956204379562
2018	37.956204379562
2019	37.956204379562
2020	39.4160583941606
2021	39.4160583941606
2022	38.6861313868613
2023	43.0656934306569