Year	% (modeled ILO estimate)
1991	60.869
1992	60.792
1993	60.764
1994	60.763
1995	60.774
1996	60.7
1997	60.686
1998	60.641
1999	60.616
2000	60.562
2001	60.517
2002	60.521
2003	59.312
2004	58.094
2005	56.85
2006	55.651
2007	54.556
2008	53.37
2009	52.096
2010	50.824
2011	49.636
2012	48.58
2013	47.333
2014	46.059
2015	44.778
2016	43.711
2017	42.625
2018	41.451
2019	40.126
2020	39.365
2021	39.271
2022	39.97
2023	40.078