Year	% (modeled ILO estimate)
1991	43.837
1992	43.573
1993	43.25
1994	42.81
1995	42.231
1996	42.041
1997	41.702
1998	41.256
1999	40.768
2000	40.28
2001	39.958
2002	39.606
2003	39.25
2004	38.914
2005	38.617
2006	38.477
2007	37.242
2008	36.022
2009	34.821
2010	33.638
2011	32.475
2012	31.333
2013	30.212
2014	29.115
2015	28.041
2016	33.867
2017	26.253
2018	26.074
2019	30.404
2020	30.113
2021	29.984
2022	29.704
2023	29.535