Year	%
1997	26.2295081967213
1998	26.2295081967213
2000	26.775956284153
2001	26.775956284153
2003	33.879781420765
2004	33.879781420765
2005	33.879781420765
2006	32.2404371584699
2007	32.7868852459016
2008	27.3224043715847
2009	27.8688524590164
2010	27.8688524590164
2011	27.8688524590164
2012	27.8688524590164
2013	33.3333333333333
2014	32.2404371584699
2015	30.6010928961749
2016	30.6010928961749
2017	34.4262295081967
2018	34.4262295081967
2019	39.344262295082
2020	39.344262295082
2021	40.4371584699454
2022	40.9836065573771
2023	40.9836065573771