Year	Percent of total labor force
1999	14.525
2000	14.008
2001	13.358
2002	15.996
2003	18.188
2004	15.067
2005	12.242
2006	9.958
2007	8.492
2008	7.354
2009	7.879
2010	8.508
2011	8.204
2012	7.823
2013	7.47
2014	6.7
2015	7.4
2016	20.863
2017	27.886
2018	35.027
2019	44.337
2020	47.884
2021	50.056
2022	51.476
2023	53.464
2024	56.035