2010 census data on the number of establishments per zip code grouped by sector and payrolled employees/establishment size. To create a pointmap of this dataset you must filter for "Meaning of 2007 North American Industry Classification System (NAICS)" AND "Number of Employees".The filter has been loaded with the necessary values. Dot size = number of establishments. To see changes in dot saize that reflect selected values, the map must be saved. Otherwise it defaults to Construction/1-4 employees.