Year	% of total employment
1983	20.98
1984	23.68
1985	24.77
1986	21.39
1987	25.44
1988	23.79
1989	19.37
1990	22
1991	17.34
1992	16.68
1993	15.1
1994	18.45
1995	19.01
1996	22.78
1997	21.21
1998	23.44
1999	19.91
2000	19
2001	18.86
2002	20.67
2003	20.3
2004	20.13
2005	20.19
2006	21.01
2007	22.21
2008	22.92
2009	25.55
2010	23.59
2011	22.49
2012	23.13
2013	24.07
2014	25.95
2015	26.26
2016	25.33
2017	25.16
2018	25.24
2019	25.1
2020	31.91
2021	25.85
2022	25.75
2023	22.41