Year	%
1997	7.27272727272727
1998	7.27272727272727
1999	9.09090909090909
2000	9.09090909090909
2001	9.09090909090909
2003	9.09090909090909
2004	9.09090909090909
2005	9.09090909090909
2006	7.27272727272727
2007	1.81818181818182
2008	7.27272727272727
2009	7.27272727272727
2010	18.1818181818182
2011	18.1818181818182
2012	18.1818181818182
2013	18.1818181818182
2014	18.1818181818182
2015	18.1818181818182
2016	18.1818181818182
2017	18.1818181818182
2018	14.5454545454545
2019	14.5454545454545
2020	23.6363636363636
2021	23.6363636363636
2022	14.5454545454545
2023	14.5454545454545