Year	% of total employment
1990	12.03
1992	9.92
1994	10.44
1996	12.94
1998	14.51
2000	13.22
2006	16.65
2009	21.08
2010	27.49
2011	28.17
2012	28.48
2013	28.44
2014	29.25
2015	28.33
2016	29.28
2017	29.27
2018	29.68
2019	30.88
2020	34.7
2021	29.58
2022	27.28
2023	28.03