More than 60% of constituency office staff recruited by MLAs since last year's Stormont election are party members, according to Assembly documents.
Some 70 of the 106 forms submitted by MLAs since May to register each new employee on their payroll declared a connection.
Sinn Fein MLAs recruited the most so-called "associated persons" during the period, with all 24 of its payroll forms for new staff disclosing their party membership.
