- The average age difference between the first and second child in the families with two children was 4 years and 1 month, while in the families with five children it was much lower (2 and a half years).
- Povprečna starostna razlika med prvim in drugim otrokom v družinah z dvema otrokoma je bila štiri leta in en mesec, v družinah s petimi otroki pa precej manj (dve leti in pol).