Year	% (modeled ILO estimate)
1991	40.198
1992	39.767
1993	39.353
1994	39.012
1995	38.45
1996	38.081
1997	37.763
1998	37.44
1999	36.867
2000	36.527
2001	33.622
2002	34.387
2003	35.601
2004	34.267
2005	32.831
2006	33.312
2007	30.855
2008	31.218
2009	29.713
2010	29.861
2011	30.238
2012	29.696
2013	30.579
2014	30.165
2015	31.108
2016	31.581
2017	30.853
2018	31.436
2019	31.107
2020	26.124
2021	22.524
2022	25.273
2023	27.62