Year	% (modeled ILO estimate)
1991	53.276
1992	52.729
1993	52.227
1994	51.806
1995	51.095
1996	50.371
1997	49.7
1998	49.018
1999	48.016
2000	47.303
2001	44.838
2002	44.462
2003	46.228
2004	43.861
2005	42.29
2006	41.581
2007	38.008
2008	38.214
2009	36.2
2010	35.899
2011	36.652
2012	36.499
2013	38.492
2014	38.104
2015	37.541
2016	38.137
2017	37.096
2018	36.072
2019	37.496
2020	30.01
2021	24.481
2022	30.223
2023	33.762