user: Question: What's the minimal number of population served?
Columns: ['Location', 'Partner', 'Construction Start', 'Inauguration Date', 'Population Served', 'Design flow (LPM)']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Ojojona, HON', 'APP', '2006 June', '2007 July', 2000.0, 375.0]
SQL:

assistant: SELECT MIN("Population Served") FROM "Table";