Year	% of total labor force (national estimate)
1991	7.16377563527126
1992	7.876454987309012
1993	7.35395462771574
1994	6.549596386315211
1995	6.034158630932144
1996	5.8664160370654965
1997	5.40775952942969
1998	4.886961361776939
1999	4.555967237525096
2000	4.276767642561542
2001	4.9829448616504814
2002	5.977404492480745
2003	6.155387351398984
2004	5.703424978305068
2005	5.259601073494543
2006	4.817925233180581
2007	4.784168062287409
2008	5.83704643853905
2009	9.169320013816314
2010	9.476347657837279
2011	8.806746736759722
2012	7.995439224523758
2013	7.349603871272836
2014	6.261482663204966
2015	5.461802756489347
2016	5.10547669523075
2017	4.5815961981045215
2018	4.108738076370304
2019	3.8924119409164533
2020	8.23128983545338
2021	5.592996056941507
2022	3.8337483513299104
2023	3.8419366687077128