Year	% (modeled ILO estimate)
1991	44.389
1992	42.817
1993	33.037
1994	31.863
1995	28.377
1996	27.959
1997	28.16
1998	28.203
1999	29.694
2000	23.796
2001	21.038
2002	21.531
2003	19.354
2004	16.163
2005	17.409
2006	20.879
2007	20.018
2008	21.777
2009	20.056
2010	17.39
2011	17.004
2012	20.144
2013	21.512
2014	24.043
2015	25.647
2016	27.827
2017	28.418
2018	30.648
2019	32.354
2020	28.275
2021	29.289
2022	32.353
2023	30.307