Union membership of wage and salary workers, 
selected occupations, 2004


Occupation				Percent

Education, training, and library	 37.6
Protective service workers		 37.3
Construction and extraction		 19.6
Installation, maintenance, and repair	 19.4
Transportation and material moving	 18.8
Community and social services		 17.4
Production occupations			 16.3
Sales and related			  3.6
Farming, fishing and forestry		  3.1