Year	% (modeled ILO estimate)
1991	45.471
1992	45.073
1993	44.882
1994	44.637
1995	45.788
1996	45.253
1997	41.215
1998	39.694
1999	43.171
2000	44.614
2001	42.801
2002	40.937
2003	38.68
2004	37.532
2005	39.816
2006	42.388
2007	44.531
2008	45.504
2009	42.127
2010	39.589
2011	36.838
2012	36.118
2013	31.542
2014	31.903
2015	32.519
2016	33.231
2017	33.741
2018	36.208
2019	36.206
2020	30.254
2021	32.196
2022	41.015
2023	40.608