Year	% of total labor force
1991	37.30662057702701
1992	36.92884277383245
1993	37.16550889536963
1994	37.80523957687587
1995	38.46465157946778
1996	38.952567984981584
1997	39.33432846212902
1998	39.902243231484086
1999	40.6258295735973
2000	41.362976347009905
2001	42.447705131075146
2002	43.45617784448396
2003	43.72762154034798
2004	44.18676950971415
2005	44.68425500661654
2006	45.29852133567772
2007	45.90077064452615
2008	46.408483828428935
2009	46.75719580662361
2010	46.66926105855001
2011	47.39263033241205
2012	47.726585845570426
2013	48.139940978809726
2014	48.45438102538287
2015	48.69447387285657
2016	48.8918234479412
2017	49.17221968873612
2018	49.15289935695986
2019	49.50303285463348
2020	49.66811190623664
2021	49.858071311470745
2022	49.70814526615743
2023	49.78126510460194