Statistics that query the database for the purpose of "age at event" calculations are distorted when the person in question has undergone a late-in-life Christening, Baptism, or Brit Milah.
Example: John was born in 1954, was christened in 1964, and married in 1974. Age at time of marriage is reported in the Statistics page as 10, not 20.
Even more ridiculous is the case of a married couple that converted to Judaism after marriage. The husband's age at time of marriage will be reported as negative because the Brit Milah ceremony will have been done after marriage.