Year	% (national estimate)
1998	50.539
1999	49.778
2000	48.2
2001	48.767
2002	49.966
2003	50.212
2004	50.682
2005	51.605
2006	54.942
2007	56.609
2008	56.782
2009	49.598
2010	47.412
2011	49.039
2012	50.74
2013	52.381
2014	52.844
2015	54.135
2016	54.592
2017	55.53
2018	56.887
2019	57.363
2020	56.68
2021	55.664
2022	56.973
2023	57.22