Year	% (modeled ILO estimate)
1991	32.673
1992	33.277
1993	33.528
1994	34.615
1995	35.915
1996	37.201
1997	38.02
1998	38.359
1999	39.017
2000	40.153
2001	40.106
2002	40.743
2003	42.346
2004	45.299
2005	46.752
2006	48.682
2007	47.839
2008	49.435
2009	48.038
2010	47.454
2011	46.489
2012	48.63
2013	48.955
2014	49.883
2015	48.091
2016	48.194
2017	47.453
2018	46.717
2019	46.047
2020	44.472
2021	43.914
2022	43.499
2023	43.898