Year	% (modeled ILO estimate)
1991	51.142
1992	51.242
1993	51.251
1994	52.02
1995	50.56
1996	49.34
1997	48.34
1998	49.05
1999	48.28
2000	46.1
2001	43.12
2002	40.06
2003	38.13
2004	35.84
2005	33.86
2006	33.53
2007	31.92
2008	31.139
2009	31.84
2010	30.88
2011	29.93
2012	31.27
2013	31.55
2014	32.2
2015	32.48
2016	31.979
2017	31.649
2018	30.409
2019	29.709
2020	27.297
2021	27.038
2022	27.6
2023	28.524