Year	% (modeled ILO estimate)
1991	17.11
1992	17.386
1993	17.579
1994	17.746
1995	17.911
1996	17.934
1997	17.966
1998	18.06
1999	18.135
2000	18.236
2001	18.219
2002	18.246
2003	18.296
2004	18.394
2005	18.554
2006	18.717
2007	18.895
2008	19.405
2009	19.94
2010	20.418
2011	20.871
2012	21.327
2013	21.8
2014	22.304
2015	22.831
2016	23.401
2017	23.98
2018	24.561
2019	25.102
2020	22.155
2021	23.245
2022	23.301
2023	23.392