Year	% of total employment
1976	34.78
1977	34.05
1978	30.88
1979	30.19
1980	33.6
1981	37.68
1982	36.94
1983	36.16
1984	35.66
1985	35.72
1986	35.63
1987	38.25
1988	35.09
1989	31.45
1990	33.35
1991	36.95
1992	40.59
1993	39.07
1994	37.09
1995	38.28
1996	36.97
1997	36.68
1998	38.07
1999	36.84
2000	34.98
2001	38.37
2002	39.21
2003	42.49
2004	40.75
2005	39.47
2006	41.1
2007	39.6
2008	40.81
2009	44.1
2010	42.48
2011	41.79
2012	40.24
2013	41.5
2014	44.22
2015	41.86
2016	41.87
2017	42.97
2018	40.38
2019	43.45
2020	43.15
2021	40.62
2022	41.6
2023	40.14