Year	% (national estimate)
1997	52.534
1998	50.906
1999	53.163
2000	53.299
2001	48.378
2002	70.256
2003	56.939
2004	57.627
2005	52.389
2006	54.878
2007	57.384
2008	58.451
2009	58.787
2010	59.636
2011	58.044
2012	57.108
2013	56.801
2014	54.44
2015	51.935
2016	51.203
2017	53.018
2018	52.627
2019	53.245
2020	43.839
2021	48.41
2022	50.779
2023	47.459