Iranians head to the polls on June 18, in what's widely perceived to be a foregone outcome. Analysts predict that popular disillusionment with Iran's political class will make this one of the lowest turnout elections in Iran's post-revolution history. According to one poll taken by the Iranian Students Polling Agency, as few as 42 percent of the eligible voting population is expected to show up. We take a look at contemporary Iran's demographics, and how this year's vote turnout might compare to previous elections.