  
<prompt> Length of Birth Intervals in Months
 Percent of non-first births in the five years before the survey by number of months since preceding births 
 [["7-17", 8], ["18-23", 11], ["24-35", 29], ["36-47", 19], ["48-60+", 32]] 
 <response> Birth intervals less than 36 months can harm the health of mothers and children  