Year	% (modeled ILO estimate)
1991	33.111
1992	33.255
1993	33.281
1994	33.335
1995	33.363
1996	33.503
1997	33.666
1998	33.821
1999	33.859
2000	33.999
2001	31.882
2002	33.265
2003	35.787
2004	34.229
2005	34.223
2006	34.774
2007	34.365
2008	35.863
2009	36.389
2010	37.464
2011	37.194
2012	37.557
2013	39.497
2014	39.862
2015	40.936
2016	40.192
2017	40.611
2018	40.753
2019	41.406
2020	38.242
2021	36.929
2022	38.737
2023	39.983