Year	% (modeled ILO estimate)
1991	64.377
1992	64.001
1993	63.087
1994	62.603
1995	62.553
1996	62.471
1997	61.104
1998	61.268
1999	60.829
2000	59.412
2001	64.351
2002	60.391
2003	60.046
2004	55.411
2005	53.619
2006	53.052
2007	54.089
2008	52.702
2009	51.546
2010	50.936
2011	51.932
2012	51.74
2013	53.528
2014	52.904
2015	51.651
2016	51.799
2017	52.942
2018	55.986
2019	55.914
2020	53.952
2021	47.978
2022	51.368
2023	54.173