Year	%
1997	36.3636363636364
1998	36.3636363636364
1999	36.3636363636364
2000	36.3636363636364
2001	35.7575757575758
2002	36.3636363636364
2003	36.3636363636364
2004	38.1818181818182
2005	37.8698224852071
2006	37.8698224852071
2007	36.094674556213
2008	36.094674556213
2009	39.6449704142012
2010	39.6449704142012
2011	39.6449704142012
2012	39.6449704142012
2013	39.6449704142012
2014	39.6449704142012
2015	39.6449704142012
2016	39.6449704142012
2017	41.4201183431953
2018	41.4201183431953
2019	40.8284023668639
2020	41.4201183431953
2021	44.9704142011834
2022	44.9704142011834
2023	46.1538461538462