Year	Percent of total labor force (Units)
1997	12.260
1998	12.800
1999	13.300
2000	12.100
2001	12.200
2002	14.470
2003	16.000
2004	19.530
2005	21.830
2006	21.560
2007	18.800
2008	14.400
2009	16.900
2010	20.000
2011	23.600
2012	24.600
2013	23.000
2014	20.552
2015	18.924
2016	16.382
2017	14.493
2018	13.673
2019	11.193
2020	9.728
2021	11.008
2022	9.396
2023	9.458
2024	9.400
2025	9.326
2026	9.260
2027	9.194
2028	9.127
2029	9.062