Issue number 284 of the CIES Football Observatory Weekly Post ranks 92 top divisions worldwide according to the average number of cards (yellow and red) per game during the current or the last completed one. The figures range from 2.3 in Japan up to 7.0 in Bolivia. Within Europe, the extreme values were recorded in Norway (3.1) and Ukraine (6.2).

The study reveals great geographical differences in aggressiveness put in the game. Eight out of the ten leagues with the most cards are from Latin America: Bolivia, Uruguay, Guatemala, El Salvador, Colombia, Ecuador, Peru and Argentina. At the opposite end, three of the five leagues with the least cards are from Asia: Japan, Vietnam and South Korea.

The values for the five major European leagues vary between 3.7 cards per game in the English Premier League and 5.8 in the Italian Serie A. Per club, the figures vary between 1.0 for Borussia Dortmund and 3.7 for Bologna, while at worldwide level they range between 0.8 for FC Tokyo and 4.0 for Montevideo Wanderers.