Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Carrie was more common in the past and has since settled at a lower, steady level. All-time it's been given to 611,316 U.S. babies, the 1,226th most common name by sound today, peaking at 19,751 in 1975, with 369 in 2025.
By sound, Carrie also includes the spellings Kerry, Kari, Kerri, Keri, Cary, Carey, Cari, Karrie, Kerrie, Karie, Karri, Carie, Carri, Kary, Karey.