What is the lowest CDR that has 112 as the difference?
CREATE TABLE "births_and_deaths" (
  "periodo" text,
  "births" real,
  "deaths" real,
  "difference" real,
  "cbr" real,
  "cdr" real,
  "imr" real,
  "tfr" real
);
SELECT MIN("cdr") FROM "births_and_deaths" WHERE "difference"=112;