Meanwhile , attrition reduced the size of the union by 500 .
In 1998 , MUNACA members voted to engage in pressure campaign , including sizeable protests supported by fellow unions SEIU Local 800 ( property services ) and AGSEM ( teaching assistants ) .
Attrition reduced the size of the union by 500 .
In 1998 , MUNACA members voted to engage in pressure campaign , including sizeable protests supported by fellow unions SEIU Local 800 ( property services ) and AGSEM ( teaching assistants ) .