of the total housing in the municipality. The historical population is given in the following chart: Heritage sites of national significance The Maison De La Dîme and the Maison du Banneret Wisard are listed as Swiss heritage site of national significance. Politics In the 2011 federal election the most popular party was the Swiss People's Party (SVP) which received 29.9% of the vote. The next three most popular parties were another local party (18.7%), the Social Democratic Party (SP) (14.9%) and the Green Party (9%). In the federal election, a total of 108 votes were cast, and the voter turnout was 40.3%. Economy , Grandval had an unemployment rate of 2.23%. , there were a total of 92 people employed in the municipality. Of these, there were 22 people employed in the primary economic sector and about 10 businesses involved in this sector. 32 people were employed in the secondary sector and there were 6 businesses in this sector. 38 people were employed in the tertiary sector, with 8 businesses in this sector. There were 188 residents of the municipality who were employed in some capacity, of which females made up 39.9% of the workforce. there were a total of 69 full-time equivalent jobs. The number of jobs in the primary sector was 13, all of which were in agriculture. The number of jobs in the secondary sector was 26 of which 21 or (80.8%) were in manufacturing and 5 (19.2%) were in construction. The number of jobs in the tertiary sector was 30. In the tertiary sector; 8 or 26.7% were in wholesale or retail sales or the repair of motor vehicles, 8 or 26.7% were in a hotel or restaurant, 8 or 26.7% were in education. , there were 27 workers who commuted into the municipality and 122 workers who commuted away. The municipality is a net exporter of workers, with about 4.5 workers leaving the municipality for every one entering. A total of 66 workers (71.0% of the 93 total workers in the municipality) both lived and worked in Grandval. Of the working population, 13.8% used public transportation to get to work, and 50.5% used a private car. In 2011 the average local and cantonal tax rate on a married resident, with two children, of Grandval making 150,000 CHF was 12.7%, while an unmarried resident's rate was 18.7%. For comparison, the rate for the entire canton in