with 71 multi-purpose buildings that were mostly used for housing (6.6%) and 56 other use buildings (commercial or industrial) that also had some housing (5.2%). Of the single family homes 34 were built before 1919, while 112 were built between 1990 and 2000. The greatest number of single family homes (175) were built between 1971 and 1980. there were 1,986 apartments in the municipality. The most common apartment size was 4 rooms of which there were 728. There were 42 single room apartments and 591 apartments with five or more rooms. Of these apartments, a total of 1,793 apartments (90.3% of the total) were permanently occupied, while 113 apartments (5.7%) were seasonally occupied and 80 apartments (4.0%) were empty. , the construction rate of new housing units was 3.6 new units per 1000 residents. the average price to rent a two-room apartment was about 892.00 CHF (US$710, £400, €570), a three-room apartment was about 1144.00 CHF (US$920, £510, €730) and a four-room apartment cost an average of 1278.00 CHF (US$1020, £580, €820). The vacancy rate for the municipality, , was 0.59%. The historical population is given in the following chart: Heritage sites of national significance Bettenach, a Roman era through High Middle Ages settlement, is listed as a Swiss heritage site of national significance. The entire Lausen area is part of the Inventory of Swiss Heritage Sites. Politics In the 2007 federal election the most popular party was the SVP which received 33.9% of the vote. The next three most popular parties were the SP (25.23%), the FDP (16.23%) and the Green Party (12.52%). In the federal election, a total of 1,453 votes were cast, and the voter turnout was 48.4%. Economy , Lausen had an unemployment rate of 2.67%. , there were 30 people employed in the primary economic sector and about 7 businesses involved in this sector. 476 people were employed in the secondary sector and there were 42 businesses in this sector. 737 people were employed in the tertiary sector, with 117 businesses in this sector. There were 2,513 residents of the municipality who were employed in some capacity, of which females made up 44.8% of the workforce. the total number of full-time equivalent jobs was 1,187. 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 539, of which 409 or