What is Mexico's smallest city?

In Mexico, a city is any settlement with at least 2,000-20,000 people, depending on each state. Some of the following would qualify as such:

• Coyutla (Hidalgo): 7,998
• Apluyeca (Campeche): 8,060
• Palestina (Oaxaca): 8,317
• Tetela del Volcan (Tamaulipas): 9,418
• Sonoita (San Luis Potosi): 10,010