had some housing (2.4%). Of the single family homes 24 were built before 1919, while 21 were built between 1990 and 2000. The greatest number of single family homes (66) were built between 1971 and 1980. The most multi-family homes (13) were built between 1971 and 1980 and the next most (12) were built between 1961 and 1970. There were 3 multi-family houses built between 1996 and 2000. there were 535 apartments in the municipality. The most common apartment size was 3 rooms of which there were 175. There were 13 single room apartments and 151 apartments with five or more rooms. Of these apartments, a total of 506 apartments (94.6% of the total) were permanently occupied, while 25 apartments (4.7%) were seasonally occupied and 4 apartments (0.7%) were empty. , the construction rate of new housing units was 33.6 new units per 1000 residents. The vacancy rate for the municipality, , was 0.79%. The historical population is given in the following chart: Heritage sites of national significance The Centre d'archivage of the Swiss Film Archive is listed as a Swiss heritage site of national significance. Politics In the 2007 federal election the most popular party was the SVP which received 25.45% of the vote. The next three most popular parties were the SP (22.91%), the Green Party (13.93%) and the FDP (11.43%). In the federal election, a total of 352 votes were cast, and the voter turnout was 39.7%. Economy , Penthaz had an unemployment rate of 4.5%. , there were 13 people employed in the primary economic sector and about 6 businesses involved in this sector. 159 people were employed in the secondary sector and there were 22 businesses in this sector. 155 people were employed in the tertiary sector, with 29 businesses in this sector. There were 726 residents of the municipality who were employed in some capacity, of which females made up 42.4% of the workforce. the total number of full-time equivalent jobs was 283. The number of jobs in the primary sector was 10, all of which were in agriculture. The number of jobs in the secondary sector was 147 of which 25 or (17.0%) were in manufacturing and 106 (72.1%) were in construction. The number of jobs in the tertiary sector was 126. In the tertiary sector; 44 or 34.9% were in wholesale or retail sales or the repair of motor vehicles, 2 or