CREATE TABLE table_22707 ("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 live births per year are there in the period where the life expectancy for females is 73.3?
SELECT "Live births per year" FROM table_22707 WHERE "Life expectancy females" = '73.3'
SELECT "Live births per year" FROM "table_22707" WHERE "Life expectancy females" = '73.3'