CREATE TABLE table_26069 ("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*" FLOAT, "Life expectancy total" TEXT, "Life expectancy males" TEXT, "Life expectancy females" TEXT)

How many imr* have tfr* of 4.31?
SELECT "IMR*" FROM table_26069 WHERE "TFR*" = '4.31'
SELECT "IMR*" FROM "table_26069" WHERE "TFR*" = '4.31'