Year	% (modeled ILO estimate)
1991	53.498
1992	53.388
1993	53.311
1994	53.219
1995	53.138
1996	53.001
1997	52.835
1998	52.633
1999	52.444
2000	52.308
2001	52.146
2002	52.004
2003	51.909
2004	51.909
2005	51.891
2006	51.859
2007	51.804
2008	51.75
2009	51.593
2010	51.428
2011	51.41
2012	51.422
2013	51.402
2014	51.348
2015	51.217
2016	51.149
2017	51.051
2018	51.044
2019	50.944
2020	48.148
2021	48.607
2022	50.731
2023	51.099