Year	% (modeled ILO estimate)
1991	51.099
1992	49.461
1993	47.889
1994	46.303
1995	46.012
1996	45.743
1997	45.918
1998	45.782
1999	47.164
2000	48.319
2001	46.983
2002	45.572
2003	44.308
2004	45.69
2005	46.972
2006	48.386
2007	49.838
2008	51.204
2009	52.134
2010	48.569
2011	48.907
2012	49.49
2013	49.774
2014	50.004
2015	50.139
2016	50.282
2017	50.475
2018	50.948
2019	51.062
2020	49.159
2021	49.348
2022	49.341
2023	49.302