Year	% (modeled ILO estimate)
1991	52.109
1992	52.163
1993	52.165
1994	51.994
1995	52.085
1996	52.282
1997	52.465
1998	52.499
1999	52.337
2000	52.607
2001	52.621
2002	52.834
2003	52.657
2004	52.656
2005	52.746
2006	52.956
2007	52.676
2008	52.634
2009	52.74
2010	53.208
2011	53.038
2012	52.948
2013	52.62
2014	52.728
2015	52.332
2016	52.046
2017	51.732
2018	51.731
2019	52.109
2020	50.219
2021	50.804
2022	52.183
2023	52.717