  
<prompt> Birth intervals | Percent distribution of non-first births by number of months since the preceding birth | (60+, 0.18) (2021-07-17 00:00:00, 0.16) (18-23, 0.13) (24-35, 0.24) (36-47, 0.17) (48-59, 0.12) <response> The percentage of births increases with increasing age, from a percentage of births among children age 6 months to a percentage of births among children age 48-59 months.  