population growth rate of -14.8%. The age distribution, , in Cerniaz is; 3 children or 7.1% of the population are between 0 and 9 years old and 5 teenagers or 11.9% are between 10 and 19. Of the adult population, 3 people or 7.1% of the population are between 20 and 29 years old. 6 people or 14.3% are between 30 and 39, 5 people or 11.9% are between 40 and 49, and 4 people or 9.5% are between 50 and 59. The senior population distribution is 7 people or 16.7% of the population are between 60 and 69 years old, 8 people or 19.0% are between 70 and 79,there is 1 person who is between 80 and 89. , there were 25 people who were single and never married in the municipality. There were 26 married individuals, 7 widows or widowers and 5 individuals who are divorced. the average number of residents per living room was 0.52 which is fewer people per room than the cantonal average of 0.61 per room. In this case, a room is defined as space of a housing unit of at least as normal bedrooms, dining rooms, living rooms, kitchens and habitable cellars and attics. About 60% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement). , there were 27 private households in the municipality, and an average of 2.3 persons per household. There were 7 households that consist of only one person and 2 households with five or more people. Out of a total of 27 households that answered this question, 25.9% were households made up of just one person. Of the rest of the households, there are 10 married couples without children, 8 married couples with children. There were 2 households that were made up of unrelated people. there were 12 single family homes (or 50.0% of the total) out of a total of 24 inhabited buildings. There was 1 multi-family building (4.2%) and 11 multi-purpose buildings that were mostly used for housing (45.8%). Of the single family homes 8 were built before 1919, while none were built between 1990 and 2000. The multi-family home was built between 1981 and 1990. there were 26 apartments in the municipality. The most common apartment size was 5 rooms of which there were 9. There were 1 single room