Year	% (modeled ILO estimate)
1991	51.057
1992	41.892
1993	37.653
1994	35.093
1995	30.254
1996	28.907
1997	34.542
1998	34.66
1999	37.099
2000	36.971
2001	37.831
2002	36.149
2003	36.633
2004	36.503
2005	40.525
2006	42.719
2007	44.598
2008	44.418
2009	37.854
2010	37.818
2011	39.669
2012	41.063
2013	39.277
2014	39.901
2015	38.298
2016	40.186
2017	41.46
2018	42.653
2019	44.245
2020	40.909
2021	43.746
2022	45.694
2023	44.855