The CDC has issued its preliminary report on US birth data for 2015.   Birth rates are down overall, driven by historic lows among younger women.  But rates among women in their 30s and 40s continue to rise.

Breaking it out by age:  the birth rate for teens fell yet again — decreasing by 8% since 2014, to 22.3 births per 1,000 women, another all-time low in a series of those.  Looking more granularly, in 2015 the rates declined 9% among teens 15-17, 7% among those 18-19, and 10% among those 10-14.  The teen birthrate (15-19) has declined 46% since 2007 (the start of the recent recession), and 64% since 1991.

Among women in their 20s, the rate decreased 3% for women 20-24 in 2015 (with a fall of 27% since 2007); the rate decreased 1% for women 25-29 (with a fall of 8% since 2007, including a less than 1% rise in 2014).

Among women in their 30s, the rate increased less than 1% for women 30-34 (with an overall increase of 5% since 2011, when what had been a downturn since 2007 turned up).  The rate increased 1% for women 35-39 in 2015 (with an overall increase of 13% since 2010).

Among women in their 40s, the rate increased by 4% for women 40-44, for a total gain of 13% since 2007; the rate among women 45+ was unchanged (though the number of births in this age group increased by 5% [from 8443 to 8876], due to an increase in women in this age group, which includes all women 45 and over).

The report did not include preliminary break outs by age at first birth or by race — that data should arrive with the rest of the deets in the Final report in the Fall.