Year	% (modeled ILO estimate)
1991	49.344
1992	49.2
1993	46.297
1994	43.418
1995	40.583
1996	37.81
1997	35.114
1998	32.51
1999	30.01
2000	31.24
2001	30.73
2002	30.47
2003	30.314
2004	30.159
2005	30.004
2006	29.85
2007	27.85
2008	26.93
2009	24.8
2010	26.383
2011	28.03
2012	27.38
2013	27.67
2014	27.89
2015	25.95
2016	28.17
2017	26.2
2018	28.74
2019	29.12
2020	33.54
2021	35.67
2022	37.724
2023	38.795