pregnancy,age_category,number_of_patients Negative,24-30,72 Negative,24-30,185 Negative,24-30,320 Negative,24-30,708 Negative,24-30,1179 Negative,24-30,1876 Negative,24-30,2597 Negative,31-37,3251 Negative,31-37,3760 Negative,31-37,4472 Negative,31-37,5321 Negative,31-37,5958 Negative,31-37,6460 Negative,31-37,6627 Negative,38-42,7064 Negative,38-42,7485 Negative,38-42,7321 Negative,38-42,6916 Negative,38-42,6097 Positive,24-30,80 Positive,24-30,211 Positive,24-30,391 Positive,24-30,775 Positive,24-30,1304 Positive,24-30,1999 Positive,24-30,2693 Positive,31-37,3309 Positive,31-37,3864 Positive,31-37,4340 Positive,31-37,4872 Positive,31-37,5318 Positive,31-37,5330 Positive,31-37,5016 Positive,38-42,4814 Positive,38-42,4531 Positive,38-42,3859 Positive,38-42,2919 Positive,38-42,2093