To know how many satanists, or jon canaanites.
Answer first how many children goes "missing".
https://globalmissingkids.org/awareness/missing-children-statistics/
In Germany, an estimated 100,000 children are reported missing each year.
In the United States, an estimated 460,000 children are reported missing every year.
In Russia, an estimated 45,000 children were reported missing in 2015.