Year	% (modeled ILO estimate)
1991	45.485
1992	44.662
1993	44.412
1994	44.011
1995	43.737
1996	43.368
1997	43.213
1998	42.759
1999	41.889
2000	41.024
2001	40.897
2002	40.769
2003	40.64
2004	38.529
2005	36.458
2006	34.433
2007	32.951
2008	31.278
2009	29.651
2010	28.674
2011	27.707
2012	26.761
2013	25.778
2014	25.531
2015	25.294
2016	25.098
2017	24.927
2018	24.776
2019	24.634
2020	22.951
2021	23.479
2022	23.485
2023	23.745