Year	% (modeled ILO estimate)
1991	33.74
1992	34.052
1993	34.416
1994	34.081
1995	33.746
1996	33.415
1997	33.09
1998	32.768
1999	32.448
2000	32.128
2001	31.809
2002	31.489
2003	31.957
2004	32.447
2005	32.947
2006	33.453
2007	33.964
2008	34.481
2009	35.003
2010	35.529
2011	36.06
2012	36.59
2013	37.127
2014	37.676
2015	38.222
2016	38.773
2017	39.332
2018	39.83
2019	36.089
2020	35.803
2021	35.559
2022	36.216
2023	36.356