How Many Kids We Have and When We Have Them
A few years ago, it seemed like everyone I knew was having babies or trying to have babies. There were baby showers, baby gifts, baby visits, and of course the social feeds were filled with baby pictures. My wife and I also had a couple of kids.
But now that I’m older, it feels more like a trickle. Many parents stop at two kids. Most are done by three. Still, everyone has their own timelines.
The chart above shows 1,000 timelines, based on data from the National Survey of Family Growth. Each moving dot is a mother. Age is on the horizontal, and with each live birth, the dot moves down a notch. The green bubbles represent the total counts for a given age.
You see the distribution for the first child clump up around mothers’ twenties, and the distributions shift older for additional kids.
There’s so much variation though in when people have kids and how many. I mean, 12 kids? Whoa. To each her own.
- I pulled the data from the 2015-2017 release of the National Survey of Family Growth, which is run by the Centers for Disease Control and Prevention. It’s been running on and off since 1973. For the interactive, I took a weighted sample of 1,000 cases.
- I analyzed and prepared the data in R.
- I made the chart using D3.js.
A Day in the Life of Americans
I wanted to see how daily patterns emerge at the individual level and how a person’s entire day plays out. So I simulated 1,000 of them.
Peak Non-Creepy Dating Pool
Based on the “half-your-age-plus-seven” rule, the range of people you can date expands with age. Combine that with population counts and demographics, and you can find when your non-creepy dating pool peaks.
The Most Gender-Switched Names in US History
We use some names mostly for boys and some mostly for girls, but then there is a small percentage that, over time, switched from one gender to another. Which names made the biggest switch?