Year	% (modeled ILO estimate)
1991	54.465
1992	55.104
1993	58.586
1994	55.04
1995	51.822
1996	48.38
1997	48.124
1998	47.755
1999	47.029
2000	48.287
2001	50.278
2002	49.404
2003	47.958
2004	49.768
2005	50.712
2006	51.428
2007	52.167
2008	51.82
2009	50.424
2010	48.53
2011	47.876
2012	45.579
2013	42.07
2014	41.008
2015	42.585
2016	42.088
2017	42.605
2018	39.51
2019	37.256
2020	36.625
2021	37.118
2022	38.8
2023	39.073