Year	% (modeled ILO estimate)
1991	58.59
1992	55.363
1993	52.09
1994	47.36
1995	46.28
1996	46.62
1997	47.022
1998	45.19
1999	45.45
2000	44.73
2001	44.53
2002	42.769
2003	40.808
2004	39.229
2005	36.578
2006	35.218
2007	34.647
2008	32.394
2009	31.304
2010	30.954
2011	30.078
2012	30.488
2013	30.789
2014	31.66
2015	31.779
2016	32.42
2017	33.179
2018	32.289
2019	29.679
2020	28.138
2021	26.234
2022	26.59
2023	27.557