Year	% of total labor force (national estimate)
1998	25
1999	25.37
2000	29.88
2001	25.371
2002	27.18
2003	27.116
2004	24.673
2005	23.84
2006	22.616
2007	22.326
2008	19.507
2009	20.512
2010	23.181
2011	21.416
2012	21.786
2013	22.038
2014	22.606
2015	22.869
2016	24.023
2017	23.992
2018	24.218
2019	25.538
2020	24.339
2021	28.77
2022	28.838
2023	27.989