About 40% of students in the Netherlands are enrolled in secondary vocational education (MBO).
70% confidence
EducationNetherlands
Omissions
The most recent CBS figure for school year 2024/'25 is 37%, not 40%; the 40% level corresponded to earlier years, as the share has been declining steadily since 46% in 2005/'06.
The claim does not specify the denominator ('students'): depending on whether one counts all secondary-education students, only upper-secondary students, or all young people in education, the share of vocational students ranges from roughly 37% (CBS) to around 54% for upper-secondary VET enrolment among 15-19 year-olds (OECD).
No source was cited by the speaker, and the exact CBS definition underlying the 37% series could not be fully checked within the search budget.