Counterfactual
The Parallel Lives of Kailey and Mari
In 153 girls, Kailey found its level. 50 years earlier, Mari occupied that same statistical address.
1970–2025
Kailey
Peak year
2004
Peak births
1,439
Latest count
153
Status
Declining
Peak generation
Gen Z
1897–2025
Mari
Peak year
1957
Peak births
412
Latest count
129
Status
Rising
Peak generation
Boomer
In 153 girls, Kailey found its level. 50 years earlier, Mari occupied that same address. One peaked in the Boomer era; the other in the Gen Z world. They never met. But the data remembers them both.