Year	% (modeled ILO estimate)
1991	48.972
1992	49.607
1993	50.696
1994	52.052
1995	52.768
1996	52.555
1997	52.161
1998	52.098
1999	51.631
2000	50.509
2001	48.989
2002	47.845
2003	47.438
2004	46.229
2005	45.694
2006	45.163
2007	44.628
2008	44.087
2009	44.137
2010	43.267
2011	42.377
2012	41.837
2013	41.136
2014	40.697
2015	40.693
2016	40.694
2017	40.251
2018	39.801
2019	39.287
2020	38.486
2021	38.905
2022	38.7
2023	38.561