Year	% (modeled ILO estimate)
1991	60.476
1992	58.576
1993	57.629
1994	56.676
1995	61.956
1996	60.036
1997	58.412
1998	57.35
1999	56.124
2000	55.698
2001	55.27
2002	54.554
2003	54.183
2004	52.213
2005	51.823
2006	51.217
2007	50.108
2008	50.201
2009	49.866
2010	49.534
2011	49.198
2012	42.033
2013	41.219
2014	45.457
2015	38.599
2016	42.938
2017	39.365
2018	40.361
2019	41.924
2020	39.627
2021	40.625
2022	40.496
2023	40.251