CEVAP:

  Things that affect voter participation (voter turnout) include population size, population changes, demographics (like, age, income, race and ethnicity), political socialization, economic development, and even weather. Other issues that can affect voter turnout are the closeness of the political race, the political importance of the issues, money spent on the campaign by political parties, the candidate (personality, fame), and the number of parties running. The voter turnout can also be affected by other factors such as: if it is a proportional electoral system in which there are several types of offices at stake, if there are registration requirements, and if voting is compulsory.