Year	% of total labor force (modeled ILO estimate)
1991	17.22
1992	17.701
1993	17.78
1994	17.805
1995	17.414
1996	17.354
1997	17.201
1998	17.184
1999	17.599
2000	17.827
2001	17.801
2002	17.372
2003	17.129
2004	17.104
2005	16.91
2006	17.792
2007	18.258
2008	19.197
2009	19.754
2010	20.39
2011	19.929
2012	19.713
2013	19.788
2014	19.922
2015	19.994
2016	20.165
2017	20.351
2018	20.502
2019	20.426
2020	21.273
2021	21.233
2022	20.501
2023	20.361