CREATE TABLE "table1_21636599_2" (
  "period" real,
  "civilians" text,
  "security_forces" text,
  "insurgents" text,
  "total_per_period" real
);

Question: What are the civilian total when the security force total is 36?
SQL: SELECT "civilians" FROM "table1_21636599_2" WHERE "security_forces"='36';

Question: What are the security forces when the civilians are 202?
SQL: SELECT "security_forces" FROM "table1_21636599_2" WHERE "civilians"='202';

Question: How many figures are named for security forces in 1998?
SQL: SELECT COUNT("security_forces") FROM "table1_21636599_2" WHERE "period"=1998;

Question: How many insurgents are there when the total per period is 156?
SQL: SELECT "insurgents" FROM "table1_21636599_2" WHERE "total_per_period"=156;