Year	% of total labor force (modeled ILO estimate)
1991	19.77
1992	19.541
1993	19.66
1994	19.958
1995	19.984
1996	20.328
1997	20.106
1998	20.503
1999	20.524
2000	20.792
2001	21.1
2002	20.617
2003	19.967
2004	19.524
2005	19.449
2006	19.15
2007	18.927
2008	18.79
2009	19.378
2010	19.951
2011	20.03
2012	19.846
2013	19.347
2014	19.229
2015	19.121
2016	19.01
2017	18.988
2018	18.968
2019	19.22
2020	20.563
2021	20.279
2022	19.51
2023	18.674