30. Of these, how many are alive?

Question No. 30: Of these [children] how many are alive?
The information refers to the number of sons/daughters currently alive including all sons/daughters who the woman has had that are alive at the date of the census.
Write down in the corresponding spaces the response of the woman. The number of children declared in this question should be less than or equal to the response in question 29. If no child is alive, write down "00".