Year	%
1997	26.1904761904762
1998	26.1904761904762
1999	30.9417040358744
2000	30.9417040358744
2001	31.0810810810811
2002	32.1724709784411
2003	32.1724709784411
2004	32.75
2005	31.7589576547231
2006	31.5960912052117
2007	31.6476345840131
2008	32.1895424836601
2009	32.7974276527331
2010	32.7974276527331
2011	32.9032258064516
2012	32.9032258064516
2013	36.4500792393027
2014	36.4500792393027
2015	36.4500792393027
2016	36.4500792393027
2017	30.7475317348378
2018	30.7475317348378
2019	30.8885754583921
2020	31.1706629055007
2021	34.9184782608696
2022	34.9184782608696
2023	35.1902173913043