Year	% (modeled ILO estimate)
1991	17.89
1992	18.066
1993	18.169
1994	18.324
1995	18.35
1996	18.421
1997	18.579
1998	18.662
1999	18.707
2000	18.791
2001	18.621
2002	18.398
2003	18.103
2004	17.83
2005	17.542
2006	17.23
2007	17.084
2008	16.958
2009	16.862
2010	16.752
2011	16.682
2012	16.603
2013	15.936
2014	15.256
2015	14.599
2016	13.962
2017	13.346
2018	13.236
2019	13.092
2020	12.806
2021	12.811
2022	12.636
2023	12.685