Q:Given the following passage "In Bern, about 50,418 or (39.2%) of the population have completed non-mandatory upper secondary education, and 24,311 or (18.9%) have completed additional higher education (either university or a Fachhochschule). Of the 24,311 who completed tertiary schooling, 51.6% were Swiss men, 33.0% were Swiss women, 8.9% were non-Swiss men and 6.5% were non-Swiss women.", answer the following question. Note that the answer is present within the text. Question: Which of upper secondary education or tertiary education has been completed by less people?
A:
tertiary