Year	% of total employment
1983	21.06
1984	21.8
1985	22.11
1986	23.62
1987	23.75
1988	23.26
1989	22.82
1990	23.43
1991	25.28
1992	26.25
1993	28.13
1994	28.43
1995	29.33
1996	29.99
1997	28.08
1998	28.59
1999	27.42
2000	29.25
2001	28.23
2002	28.18
2003	36.04
2004	36.81
2005	25.46
2006	25.93
2007	25.69
2008	25.67
2009	26.74
2010	25.3
2011	24.94
2012	25.46
2013	27.04
2014	27.4
2015	26.82
2016	39
2017	39.33
2018	39.03
2019	39.5
2020	43.8
2021	40.13
2022	38.35
2023	38.94