Year	% (modeled ILO estimate)
1991	52.937
1992	51.739
1993	49.407
1994	47.674
1995	45.788
1996	42.991
1997	45.725
1998	46.977
1999	47.632
2000	48.537
2001	49.328
2002	50.025
2003	50.637
2004	51.214
2005	51.83
2006	52.487
2007	53.185
2008	53.925
2009	54.64
2010	55.099
2011	55.544
2012	55.938
2013	56.248
2014	56.527
2015	56.777
2016	57.003
2017	57.027
2018	56.919
2019	57.428
2020	57.109
2021	57.6
2022	57.733
2023	57.572