Year	% of total labor force
1991	35.10355366346729
1992	35.85489288667267
1993	36.95578660051296
1994	37.473343174507114
1995	37.87090053902232
1996	38.655019231539725
1997	39.14328195626749
1998	39.77390931278307
1999	40.40043828956168
2000	40.670521845116326
2001	40.845350907185676
2002	41.612954391429106
2003	41.840745477579134
2004	41.74122836776496
2005	42.28444346511921
2006	42.2840461822215
2007	43.016682533594505
2008	43.46959910019502
2009	44.31232268945503
2010	44.78651027877295
2011	45.098169284588955
2012	45.22264538983505
2013	45.41902500719569
2014	45.33499697586626
2015	45.231869519776815
2016	45.54976158900605
2017	45.724003495099936
2018	45.88808751883989
2019	45.92273046804754
2020	45.862404686391194
2021	46.477997773910865
2022	46.55257673035115
2023	46.7727224251714