Year	% (modeled ILO estimate)
1991	54.916
1992	54.676
1993	54.457
1994	54.26
1995	54.174
1996	54.114
1997	54.068
1998	54.04
1999	54.028
2000	54.026
2001	53.304
2002	52.593
2003	51.91
2004	51.252
2005	50.624
2006	48.917
2007	47.247
2008	45.601
2009	43.982
2010	42.383
2011	40.711
2012	39.045
2013	38.256
2014	37.409
2015	36.482
2016	35.393
2017	34.263
2018	33.108
2019	33.848
2020	32.398
2021	33.918
2022	35.524
2023	35.456