Year	% (modeled ILO estimate)
1991	41.787
1992	37.554
1993	36.08
1994	33.977
1995	33.536
1996	33.959
1997	33.815
1998	33.031
1999	33.725
2000	33.904
2001	32.412
2002	30.874
2003	30.111
2004	31.978
2005	28.793
2006	26.943
2007	25.495
2008	25.599
2009	23.733
2010	23.171
2011	22.848
2012	24.058
2013	23.457
2014	23.133
2015	21.722
2016	22.799
2017	22.151
2018	21.94
2019	22.071
2020	18.829
2021	20.162
2022	21.6
2023	21.494