Year	% (modeled ILO estimate)
1991	50.348
1992	49.231
1993	48.041
1994	47.009
1995	46.155
1996	45.485
1997	44.817
1998	44.268
1999	43.618
2000	43.588
2001	43.567
2002	43.478
2003	43.513
2004	43.512
2005	43.623
2006	43.675
2007	43.676
2008	43.476
2009	43.341
2010	43.328
2011	43.41
2012	43.387
2013	43.213
2014	43.164
2015	43.135
2016	43.121
2017	41.211
2018	39.36
2019	37.521
2020	37.586
2021	38.508
2022	37.905
2023	37.844