Year	% (modeled ILO estimate)
1991	56.003
1992	56.219
1993	56.581
1994	55.692
1995	54.821
1996	53.961
1997	53.102
1998	52.231
1999	51.347
2000	50.46
2001	49.572
2002	48.678
2003	47.78
2004	46.882
2005	45.981
2006	45.071
2007	44.156
2008	43.247
2009	42.353
2010	41.461
2011	40.568
2012	39.681
2013	38.805
2014	37.938
2015	37.076
2016	36.223
2017	35.381
2018	34.551
2019	34.307
2020	33.976
2021	34.002
2022	35.316
2023	35.312