Year	% (modeled ILO estimate)
1991	45.012
1992	45.093
1993	45.098
1994	44.363
1995	44.708
1996	43.88
1997	43.946
1998	43.425
1999	43.3
2000	43.118
2001	42.524
2002	41.668
2003	41.21
2004	40.754
2005	40.3
2006	39.847
2007	39.397
2008	38.947
2009	37.602
2010	36.274
2011	34.993
2012	33.503
2013	32.238
2014	32.325
2015	30.373
2016	28.691
2017	28.405
2018	28.168
2019	27.975
2020	26.292
2021	26.787
2022	26.765
2023	26.534