Year	% (modeled ILO estimate)
1991	57.627
1992	56.153
1993	54.157
1994	53.622
1995	54.355
1996	53.537
1997	54.417
1998	55.345
1999	55.38
2000	56.102
2001	54.151
2002	52.128
2003	50.124
2004	48.09
2005	46.064
2006	44.017
2007	41.985
2008	39.922
2009	37.916
2010	35.945
2011	35.666
2012	35.414
2013	35.219
2014	34.222
2015	33.803
2016	33.483
2017	33.302
2018	33.491
2019	33.125
2020	32.605
2021	32.153
2022	32.121
2023	31.972