There have been five national referendums in Chile since 1925. The 1980 constitution provides for binding referendums only in the case a constitutional reform passed by Congress is completely vetoed by the President and then re-approved by Congress by a two-thirds majority of each chamber. In such occurrence the President has the authority to either sign the reform into law or call for a referendum. To date, the President has not exercised such power.
a There was no electoral roll for this referendum.
Note: The percentages used in the "Yes", "No" and "Neither" columns are over the total of valid votes in each referendum. The percentages used in the "Null" and "Blank" columns are over the total votes cast in each referendum.