teenagers (0–19 years old) make up 21.3% of the population, while adults (20–64 years old) make up 63.2% and seniors (over 64 years old) make up 15.4%. , there were 57 people who were single and never married in the municipality. There were 65 married individuals, 7 widows or widowers and 7 individuals who are divorced. , there were 56 private households in the municipality, and an average of 2.4 persons per household. There were 16 households that consist of only one person and 4 households with five or more people. , a total of 53 apartments (96.4% of the total) were permanently occupied and 2 apartments (3.6%) were empty. The historical population is given in the following chart: Heritage sites of national significance The Chalet de Diesbach and the granary of Château d’En-Haut are listed as Swiss heritage site of national significance. The hamlets of Granges-sur-Marly and Villars-sur-Marly are part of the Inventory of Swiss Heritage Sites. Politics In the 2011 federal election the most popular party was the SVP which received 23.0% of the vote. The next three most popular parties were the CVP (22.8%), the SPS (18.1%) and the FDP (17.6%). The SVP received about the same percentage of the vote as they did in the 2007 Federal election (26.1% in 2007 vs 23.0% in 2011). The CVP moved from third in 2007 (with 22.8%) to second in 2011, the SPS moved from fourth in 2007 (with 13.9%) to third and the FDP moved from second in 2007 (with 25.3%) to fourth. A total of 60 votes were cast in this election. Economy , Pierrafortscha had an unemployment rate of 1.5%. , there were 36 people employed in the primary economic sector and about 10 businesses involved in this sector. 9 people were employed in the secondary sector and there was 1 business in this sector. 5 people were employed in the tertiary sector, with 3 businesses in this sector. There were 78 residents of the municipality who were employed in some capacity, of which females made up 35.9% of the workforce. the total number of full-time equivalent jobs was 41. The number of jobs in the primary sector was 28, all of which were in agriculture. The number of jobs in the secondary sector was 8, all of which were in manufacturing. The number of jobs in the tertiary sector was 5, of which 1 was