Year	% of total employment
1998	17.07
1999	20.09
2000	22.02
2001	21.95
2002	20.83
2003	25.77
2004	24.49
2005	23.32
2006	23.39
2007	21.01
2008	16.44
2009	20.14
2010	19.35
2011	20.62
2012	21.06
2013	21.61
2014	22.08
2015	21
2016	19.6
2017	23.83
2018	22.78
2019	22.44
2020	27.5
2021	22.86
2022	24.22
2023	22.55