CREATE TABLE "table1_23423_2" (
  "period" text,
  "live_births_per_year" text,
  "deaths_per_year" text,
  "natural_change_per_year" text,
  "cbr" text,
  "cdr" text,
  "nc" text,
  "tfr" text,
  "imr" real,
  "life_expectancy_total" text,
  "life_expectancy_males" text,
  "life_expectancy_females" text
);

Question: How many imr* have 64.3 life expectancy males?
SQL: SELECT MIN("imr") FROM "table1_23423_2" WHERE "life_expectancy_males"='64.3';

Question: How many imr* have tfr* of 4.31?
SQL: SELECT "imr" FROM "table1_23423_2" WHERE "tfr"='4.31';

Question: How many deaths per year have 66.3 as the life expectancy females?
SQL: SELECT "deaths_per_year" FROM "table1_23423_2" WHERE "life_expectancy_females"='66.3';

Question: How many imr* have tfr* 5.35?
SQL: SELECT COUNT("imr") FROM "table1_23423_2" WHERE "tfr"='5.35';