Year	% of total employment
1983	19.66
1984	18.47
1985	18.14
1986	16.68
1987	18.06
1988	17.92
1989	18.8
1990	20.52
1991	20.65
1992	20.11
1993	20.54
1994	21.14
1995	22.28
1996	22.54
1997	23.91
1998	24.59
1999	25.14
2000	26.16
2001	26.54
2002	26.76
2003	28.2
2004	29.21
2005	34.46
2006	35.55
2007	35.51
2008	36.33
2009	39.01
2010	38.76
2011	39.21
2012	40.1
2013	40.73
2014	40.51
2015	40.46
2016	39.71
2017	40.79
2018	40.77
2019	41.17
2020	43.27
2021	42.83
2022	42.88
2023	43.74