Year-by-year card, red and penalty rates. Away card share above 50% means away teams picked up more cards than home teams under this official — a rough home-advantage / bias signal across the sample.
Yellows, reds and fouls per match, ranked against other referees in the same competition. Decile 10 = among the strictest; 1 = most lenient. A high decile means cards come more easily under this official.