By 2015, 56 % of 15-year-old students in the United Kingdom were enrolled in a privately managed school …

„In 2000, less than 10 % of 15-year-old students in the United Kingdom were enrolled in a privately managed school; by 2015, 56 % were.“
OECD (Hrsg.), „Balancing School Choice and Equity: An International Perspective Based on PISA“ (2019), S. 28