This seems very low. I have not worked in professional screenprinting environments, but all resources I have seen indicate potential for hundreds or thousands of high quality prints from a well prepared screen.
Years and year ago, I worked in a sign makers and helped out with screen printing on occasion. Screens can last a very long time provided they are created corrected. From memory there were at least 200+ prints from a single screen - I think they may have been t-shirts or tote bags.