(1) "Year" means a calendar year.
(2) "City" means only cities of this state which are regularly operating as such through elected governmental officers.
(3) "Population" means population as given in the latest determination of Portland State University. [Amended by 1961 c.259 §2; 1961 c.653 §1; 1963 c.399 §1; 2013 c.768 §106i; 2015 c.138 §12]