Year	% (modeled ILO estimate)
1991	56.591
1992	50.957
1993	47.506
1994	45.238
1995	43.143
1996	42.312
1997	44.159
1998	47.09
1999	46.33
2000	44.79
2001	46.55
2002	47.119
2003	44.85
2004	42.638
2005	42.118
2006	41.648
2007	41.329
2008	40.889
2009	38.7
2010	36.12
2011	38.15
2012	37.08
2013	35
2014	34.3
2015	33.53
2016	33.169
2017	33.979
2018	34.18
2019	34.28
2020	30.159
2021	29.74
2022	31.099
2023	35.462