Year	% (national estimate)
1992	43.06459971920412
1993	40.095791663602654
1994	39.13501300146271
1995	38.071978427087245
1996	37.14352721835953
1997	35.90416320737328
1998	35.58121750842639
1999	36.84232722362919
2000	36.717991062492175
2001	36.309772592835394
2002	35.954352045687926
2003	34.81754699133097
2004	34.49223284398589
2005	34.18642317610841
2006	34.32158539560262
2007	34.797400896221255
2008	35.37225772238241
2009	33.30972978661109
2010	33.056540053132785
2011	33.24255914525687
2012	32.343725620837006
2013	32.50011559869426
2014	32.501921238331725
2015	32.959697626901324
2016	33.19391416856312
2017	33.437925104855125
2018	33.77045398491097
2019	33.790496777876406
2020	31.494188574425607
2021	32.607258208092965
2022	34.361953329429696
2023	35.290687860435945