user: Question: What are the civilian total when the security force total is 36?
Columns: ['Period', 'Civilians', 'Security forces', 'Insurgents', 'Total per period']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1996.0, 'N/A', 'N/A', 'N/A', 156.0]
SQL:

assistant: SELECT SUM("Civilians") FROM "Table" WHERE "Security forces" = '36';