Year	% (modeled ILO estimate)
1991	52.717
1992	52.657
1993	52.645
1994	52.549
1995	52.585
1996	52.615
1997	52.391
1998	52.177
1999	51.97
2000	51.776
2001	51.478
2002	51.199
2003	50.875
2004	50.594
2005	50.276
2006	49.891
2007	49.567
2008	49.525
2009	49.529
2010	49.467
2011	49.466
2012	49.522
2013	49.623
2014	49.747
2015	49.846
2016	49.89
2017	49.899
2018	49.878
2019	49.852
2020	48.606
2021	49
2022	49.716
2023	49.597