Year	% (modeled ILO estimate)
1991	35.189
1992	35.146
1993	35.038
1994	34.822
1995	34.491
1996	34.343
1997	34.125
1998	34.269
1999	34.02
2000	33.733
2001	33.462
2002	33.226
2003	32.975
2004	32.698
2005	32.41
2006	32.265
2007	32.094
2008	31.923
2009	31.761
2010	31.601
2011	31.51
2012	31.495
2013	31.414
2014	31.344
2015	31.204
2016	31.104
2017	30.976
2018	30.862
2019	30.68
2020	30.4
2021	30.276
2022	30.72
2023	30.64