Up to 15% of priests in some dioceses were alleged perpetrators between 1950 and 2015, with abusers most prevalent in the dioceses of Sale and Sandhurst in Victoria, Port Pirie in South Australia, and Lismore and Wollongong in New South Wales. The numbers were even worse in some national Catholic orders. By far the worst was the order of the St John of God Brothers, where a staggering 40% of religious brothers are believed to have abused children.
Twenty-two per cent of Christian Brothers and 20% of Marist Brothers, both orders that run schools, were alleged perpetrators. More than one in five priests in the Benedictine community of New Norcia were alleged perpetrators, while 17.2% of clergy were accused of crimes against children in the Salesians of Don Bosco order.
In total, between 1980 and 2015, 4,444 people alleged incidents of child sexual abuse relating to 93 Catholic Church authorities. The abuse allegedly took place in more than 1,000 institutions. The average age of victims was 10.5 for girls and 11.6 for boys. The overwhelming majority of survivors were male. Almost 1,900 perpetrators were identified and another 500 remained unidentified. Thirty-two per cent were religious brothers, 30% were priests, 29% were lay people and 5% were religious sisters.