Year	%
1997	9.54545454545455
1998	15.4545454545455
1999	15.4545454545455
2000	15.4545454545455
2001	15.4545454545455
2002	15.4545454545455
2003	15.4545454545455
2004	15
2005	15
2006	15
2007	15
2008	37.2727272727273
2009	38.6363636363636
2010	38.6363636363636
2011	38.1818181818182
2012	34.0909090909091
2013	34.0909090909091
2014	36.8181818181818
2015	36.8181818181818
2016	36.8181818181818
2017	30.4545454545455
2018	30.4545454545455
2019	30
2020	30
2021	29.5454545454545
2022	33.6363636363636
2023	33.6363636363636