Year	% (modeled ILO estimate)
1991	23.763597622834382
1992	24.338427608471292
1993	24.23969889494752
1994	24.836889284121828
1995	24.8352675123657
1996	24.8978322535426
1997	25.03570706303039
1998	25.266512367736702
1999	26.02388640745246
2000	26.582802789514037
2001	27.05234669283128
2002	26.7768069381834
2003	27.38764173174815
2004	27.930690052733652
2005	28.57282889635667
2006	28.90576948363769
2007	29.544395837723858
2008	28.776310104260823
2009	29.452920730305507
2010	29.395034788992024
2011	29.28393943441617
2012	29.819631208919457
2013	29.70803075086413
2014	29.960594257396618
2015	30.909703212771397
2016	31.80932769866767
2017	31.43785668232655
2018	30.40650337134758
2019	29.87725400322354
2020	29.684416162586498
2021	29.944110898099183
2022	29.664678406390067
2023	30.113563816165883
