Year	% (modeled ILO estimate)
1991	52.705
1992	52.586
1993	52.419
1994	51.839
1995	51.942
1996	51.476
1997	51.053
1998	50.839
1999	50.299
2000	50.328
2001	50.96
2002	50.865
2003	50.358
2004	50.529
2005	49.431
2006	47.935
2007	47.556
2008	45.369
2009	44.971
2010	43.172
2011	41.682
2012	39.934
2013	37.492
2014	36.374
2015	33.965
2016	32.264
2017	31.925
2018	31.808
2019	31.813
2020	28.538
2021	29.881
2022	30.909
2023	30.673