Year	%
1997	7.57575757575758
1998	7.57575757575758
1999	7.57575757575758
2000	5.71428571428571
2001	5.71428571428571
2002	5.71428571428571
2003	5.71428571428571
2004	5.71428571428571
2005	17.1428571428571
2006	17.1428571428571
2007	17.1428571428571
2008	17.1428571428571
2009	17.1428571428571
2010	18.8405797101449
2011	18.8405797101449
2012	18.8405797101449
2013	18.8405797101449
2014	18.8405797101449
2015	11.5942028985507
2016	11.5942028985507
2017	11.5942028985507
2018	11.5942028985507
2019	20
2020	20
2021	20
2022	20
2023	20