Year	% (modeled ILO estimate)
1991	42.524
1992	43.184
1993	42.234
1994	41.303
1995	40.383
1996	39.472
1997	38.523
1998	37.597
1999	36.637
2000	35.667
2001	36.853
2002	35.025
2003	32.581
2004	33.187
2005	30.976
2006	31.1
2007	31.517
2008	33.722
2009	33.764
2010	35.419
2011	33.787
2012	35.207
2013	34.233
2014	31.447
2015	30.396
2016	27.894
2017	30.424
2018	27.754
2019	27.488
2020	25.275
2021	24.134
2022	26.058
2023	26.322