Year	% (modeled ILO estimate)
1991	42.219
1992	42.279
1993	40.222
1994	40.111
1995	39.743
1996	38.762
1997	38.088
1998	37.673
1999	35.319
2000	33.642
2001	37.415
2002	35.512
2003	36.246
2004	33.037
2005	32.865
2006	33.623
2007	35.439
2008	36.059
2009	33.142
2010	33.232
2011	28.614
2012	25.889
2013	23.033
2014	26.009
2015	27.055
2016	26.38
2017	31.058
2018	35.4
2019	34.321
2020	32.134
2021	33.398
2022	33.676
2023	35.822