Year	Percent of total labor force
1999	14.6
2000	16.375
2001	17.362
2002	13.737
2003	12.441
2004	10.884
2005	8.324
2006	5.778
2007	4.248
2008	5.827
2009	13.787
2010	17.814
2011	15.39
2012	13.366
2013	11.77
2014	10.699
2015	9.119
2016	7.861
2017	7.073
2018	6.3
2019	6.25
2020	6.2
2021	6.15
2022	6.05
2023	6
2024	6