Year	% (modeled ILO estimate)
1991	43.406
1992	40.225
1993	37.135
1994	34.029
1995	33.255
1996	32.581
1997	31.562
1998	30.048
1999	29.845
2000	29.451
2001	28.592
2002	26.978
2003	25.671
2004	28.54
2005	31.214
2006	33.97
2007	33.545
2008	33.038
2009	32.11
2010	30.212
2011	29.703
2012	29.453
2013	28.915
2014	28.341
2015	27.689
2016	27.06
2017	26.492
2018	26.198
2019	25.581
2020	23.207
2021	24.37
2022	26.149
2023	25.977