Year	% (modeled ILO estimate)
1991	43.216
1992	43.473
1993	43.519
1994	43.191
1995	42.748
1996	42.107
1997	41.359
1998	40.975
1999	41.976
2000	41.327
2001	40.605
2002	39.926
2003	39.43
2004	38.432
2005	37.777
2006	37.147
2007	33.088
2008	32.416
2009	28.779
2010	28.06
2011	28.207
2012	29.368
2013	28.495
2014	28.414
2015	29.172
2016	30.279
2017	30.611
2018	29.978
2019	29.623
2020	28.291
2021	33.7
2022	32.722
2023	31.863