Year	% (modeled ILO estimate)
1991	25.97
1992	25.714
1993	25.108
1994	27.762
1995	28.928
1996	27.125
1997	27.355
1998	27.135
1999	26.102
2000	26.89
2001	27.801
2002	28.769
2003	29.754
2004	30.774
2005	31.464
2006	32.121
2007	32.734
2008	33.393
2009	34.01
2010	35.476
2011	36.177
2012	36.852
2013	38.169
2014	38.444
2015	39.36
2016	40.159
2017	40.29
2018	40.914
2019	41.055
2020	37.887
2021	39.038
2022	39.217
2023	39.652