Year	% of total labor force (national estimate)
1985	25.67
1991	13.82
1994	21.2
1996	21.593
1998	20.86
2000	15.88
2001	18.54
2003	23.8
2006	17.782
2009	16.169
2010	17.86
2019	20.094
2020	21.017
2021	23.106
2022	23.615
2023	23.381