Year	% (modeled ILO estimate)
1991	61.43141348056671
1992	61.07097212216337
1993	60.593619678490825
1994	60.048538393278065
1995	59.58426922553472
1996	59.31666595672273
1997	59.01937141127795
1998	58.673680798686476
1999	58.27577478634001
2000	57.88793145255023
2001	57.607316845897564
2002	57.32160653302205
2003	57.03214255898778
2004	56.76241354889556
2005	56.55521017311572
2006	56.27642968351822
2007	55.962472800461015
2008	55.67889941686242
2009	55.12542428149304
2010	54.39119099865224
2011	54.47808498520633
2012	54.31237314565447
2013	54.273013220804835
2014	53.98385492077712
2015	54.05754318658362
2016	53.893020979875836
2017	53.53174578614163
2018	52.973738593951616
2019	52.5371988158358
2020	52.08087434228444
2021	51.83840040415997
2022	51.756975583258225
2023	51.89024814860333
