Are Catholic schools run by seculars a post-Vatican II novelty?

Question

Are Catholic schools run by seculars (non-religious laity) a post-Vatican II novelty?

Answer 1

• Jamie Faser Arthur, “What Is the Lived Experience of Laywomen Who Serve as Catholic Elementary School Principals in Their Roles as Faith Leaders?” (Georgia State University, 2012), 11:

In 1965 indicate there were 13,292 schools serving 5.6 million students with religious orders positioned in nearly 100% of administrative positions and 58% religious as full-time professional staff (Guerra, 1991). However, 2009-2010 figures show a sharp decline with only 7,248 Catholic schools, 2.2 million students, and only 3% religious orders serving as full-time professional staff (NCEA, 2010). […] the closing of nearly 50% of its schools and 97% fewer religious serving the remaining ones

^{(my emphases)}