90
Parent/Child Height Relationships - Regression toward the Mean
(files.catbox.moe)
Source of data: https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/T0HSJ1
Edit: removed OC as it's not (sorry)
yes, 928 children and 205 parents it seems.
wonder how the trend shown here has changed in almost 150 years...