Year	% (modeled ILO estimate)
1991	37.287
1992	37.192
1993	37.151
1994	37.136
1995	37.088
1996	37.052
1997	36.617
1998	36.217
1999	35.85
2000	35.461
2001	35.073
2002	34.649
2003	34.271
2004	33.896
2005	33.046
2006	34.74
2007	36.421
2008	38.165
2009	39.919
2010	41.719
2011	43.513
2012	42.088
2013	40.676
2014	39.29
2015	37.771
2016	36.246
2017	36.273
2018	36.299
2019	36.295
2020	34.946
2021	34.813
2022	36.375
2023	37