Year	% of total employment
1990	42.6
1991	41.72
1992	44.24
1993	43.6
1994	44
1996	40.61
1997	38.63
1998	42.44
1999	40.85
2000	37.43
2001	36.24
2002	36.75
2003	36.36
2004	34.79
2005	35.12
2006	35.51
2007	35.8
2008	36.6
2009	36.41
2010	36.36
2011	37.08
2012	37.35
2013	39.9
2014	37.57
2015	35.09
2016	35.21
2017	35.77
2018	37.5
2019	37.18
2020	39.9
2021	41.94
2022	39.17