Year	% (modeled ILO estimate)
1991	51.803
1992	50.865
1993	50.563
1994	53.302
1995	49.18
1996	46.997
1997	41.655
1998	40.899
1999	36.969
2000	37.384
2001	35.404
2002	31.782
2003	38.753
2004	39.735
2005	35.872
2006	35.622
2007	37.945
2008	40.797
2009	38.995
2010	37.658
2011	39.978
2012	40.814
2013	39.735
2014	39.109
2015	41.821
2016	43.251
2017	46.123
2018	47.35
2019	44.674
2020	42.956
2021	40.287
2022	44.748
2023	44.075