Year	% of total labor force
1991	31.161291594385744
1992	31.806003003181903
1993	32.20973643792856
1994	32.21423364859561
1995	32.335629754354954
1996	32.48732267664558
1997	32.842539201886055
1998	33.08285334113108
1999	33.28722643159405
2000	33.41742580918216
2001	32.832139327416535
2002	34.06275920390572
2003	33.915490143348535
2004	33.80480141104599
2005	34.528048280118476
2006	34.846056006902984
2007	34.65525362160461
2008	35.82866154539711
2009	34.634291886829374
2010	36.31231353086381
2011	37.14346050193071
2012	37.67787910829148
2013	37.71527771876201
2014	37.820000171090626
2015	38.58194536160638
2016	38.870624459936664
2017	39.10921799324269
2018	39.27092570013572
2019	40.16052606510802
2020	39.18803788759747
2021	40.378877422010525
2022	39.91716542816125
2023	40.633502786249586