Year	% (modeled ILO estimate)
1991	37.359
1992	36.164
1993	34.907
1994	33.514
1995	32.727
1996	31.882
1997	31.121
1998	29.989
1999	28.978
2000	26.99
2001	26.29
2002	25.576
2003	24.948
2004	24.211
2005	23.548
2006	22.388
2007	21.372
2008	21.813
2009	22.28
2010	22.615
2011	23.042
2012	23.426
2013	23.622
2014	23.369
2015	23.362
2016	23.204
2017	23.13
2018	23.027
2019	22.976
2020	21.06
2021	21.312
2022	21.891
2023	21.783