 33 (or about 3.46% of the population) belonged to no church, are agnostic or atheist, and 38 individuals (or about 3.98% of the population) did not answer the question.In St. Silvester about 309 or (32.4%) of the population have completed non-mandatory upper secondary education, and 47 or (4.9%) have completed additional higher education (either university or a "Fachhochschule").Of the 47 who completed tertiary schooling, 76.6% were Swiss men, 14.9% were Swiss women.