Year	% (modeled ILO estimate)
1991	52.011
1992	51.105
1993	50.111
1994	49.003
1995	47.781
1996	46.66
1997	45.494
1998	44.269
1999	42.986
2000	41.663
2001	40.642
2002	39.571
2003	38.503
2004	37.522
2005	36.684
2006	36.077
2007	35.612
2008	35.266
2009	32.695
2010	28.222
2011	29.892
2012	29.412
2013	29.582
2014	28.422
2015	30.692
2016	31.011
2017	31.431
2018	29.61
2019	29.73
2020	26.15
2021	26.5
2022	29.819
2023	31.213