Countries in South America 1990-2023, by regime type

The V-Dem Institute defines the different regimes as follows:
Closed autocracy: citizens do not have the right to choose either the chief executive of the government or the legislature through multi-party elections.

Electoral autocracy: citizens have the right to choose the chief executive and the legislature through multi-party elections; but they lack some freedoms, such as the freedoms of association or expression that make the elections meaningful, free, and fair.

Electoral democracy: citizens have the right to choose the chief executive and the legislature in meaningful, free and fair, and multi-party elections.

Liberal democracy: electoral democracy and citizens enjoy individual and minority rights, are equal before the law, and the actions of the executive are constrained by the legislative and the courts.