„The Ministry of Education reported that, from June 2007, 43 % of this industry is cram schools, and in the past ten years, the number of cram schools has increased fivefold.“
Dr. Jeng Liu, „Does cram schooling matter? Who goes to cram schools? Evidence from Taiwan“. In: „International Journal of Educational Development“, 32 (2012), S. 47
In Österreich sind es laut Arbeiterkammerstudie etwa 1 %.