Year	% (modeled ILO estimate)
1991	37.35
1992	35.99
1993	34.651
1994	33.331
1995	32.032
1996	30.759
1997	31.178
1998	31.6
1999	32.026
2000	32.456
2001	32.89
2002	33.328
2003	33.77
2004	34.215
2005	34.663
2006	33.06
2007	31.418
2008	29.07
2009	29.533
2010	29.197
2011	27.067
2012	27.886
2013	25.886
2014	24.573
2015	24.993
2016	26.485
2017	27.707
2018	27.199
2019	26.158
2020	22.545
2021	22.071
2022	21.965
2023	22.443