Year	% (modeled ILO estimate)
1991	38.631
1992	38.487
1993	38.381
1994	38.315
1995	38.314
1996	38.313
1997	38.306
1998	38.298
1999	38.29
2000	38.282
2001	37.777
2002	37.271
2003	36.774
2004	36.279
2005	35.786
2006	34.554
2007	33.339
2008	32.136
2009	30.953
2010	29.786
2011	28.484
2012	27.205
2013	26.549
2014	25.848
2015	25.082
2016	24.199
2017	23.275
2018	22.334
2019	22.618
2020	21.53
2021	22.476
2022	23.751
2023	24.788