probably American:

https://www.statista.com/statistics/235406/undergraduate-enr...

https://www.qualityinfo.org/-/college-enrollment-among-recen...

https://www.pewresearch.org/religion/2013/03/13/strong-catho...

https://www.graphsaboutreligion.com/p/the-catholic-church-is...

The Catholic Church is similarly struggling in the UK:

https://faithsurvey.co.uk/blog/church-attendance-in-england-...