Mario Kart 8 item probability distributions

The following distributions are used by version 4.1 of Mario Kart 8 to determine the probability of obtaining a certain item when an Item Box is opened. . Such a probability is coded as a percentage multiplied by two.

Races
During races, each probability distribution is chosen depending on the distance from the frontrunner in the moment the Item Box was opened. The distance reported is the one at which the switch to the next distribution happens.

Versus races feature five additional distributions sets whose distributions are all made to obtain a specific item and whose purpose is unclear. Most of them are reported without the distance as it is not determined whether they are used by drivers controlled by players or by the software.