Year	% of total employment
1986	22.62
1987	24.05
1988	26.13
1989	27.57
1990	27.02
1991	29.8
1992	28.98
1993	23.54
1994	25.56
1995	29.05
1996	30.97
1997	28.18
1998	28.16
1999	19.51
2000	26.56
2001	27.58
2002	25.55
2003	28.76
2004	26
2005	28.63
2006	27.25
2007	28.95
2008	29.02
2009	31.1
2010	30.21
2011	30.25
2012	31
2013	31.42
2014	30.58
2015	30
2016	29.26
2017	30.83
2018	28.96
2019	29.99
2020	37.54
2021	36.49
2022	36.46
2023	35.6