Year	% (modeled ILO estimate)
1991	53.896
1992	53.197
1993	52.396
1994	51.577
1995	50.793
1996	50.195
1997	49.744
1998	49.352
1999	48.9
2000	48.675
2001	48.451
2002	48.227
2003	48.002
2004	47.778
2005	47.553
2006	47.328
2007	47.104
2008	46.879
2009	46.654
2010	46.429
2011	46.204
2012	45.979
2013	45.755
2014	45.53
2015	45.306
2016	45.081
2017	44.154
2018	43.206
2019	42.23
2020	41.828
2021	41.649
2022	41.117
2023	41.246