Year	% (modeled ILO estimate)
1991	38.411
1992	38.595
1993	38.821
1994	38.55
1995	38.753
1996	38.6
1997	38.67
1998	38.662
1999	38.306
2000	36.89
2001	36.001
2002	35.125
2003	34.261
2004	33.408
2005	32.566
2006	28.962
2007	28.472
2008	29
2009	29.079
2010	30.899
2011	30.039
2012	27.89
2013	33.485
2014	34.503
2015	37.426
2016	36.433
2017	37.271
2018	40.486
2019	36.912
2020	43.175
2021	41.049
2022	40.862
2023	40.398