district, and an average of 2.5 persons per household. There were 693 households that consist of only one person and 254 households with five or more people. Out of a total of 2,144 households that answered this question, 32.3% were households made up of just one person and there were 30 adults who lived with their parents. Of the rest of the households, there are 527 married couples without children, 734 married couples with children There were 84 single parents with a child or children. There were 39 households that were made up of unrelated people and 37 households that were made up of some sort of institution or another collective housing. there were 646 single family homes (or 47.2% of the total) out of a total of 1,370 inhabited buildings. There were 264 multi-family buildings (19.3%), along with 331 multi-purpose buildings that were mostly used for housing (24.2%) and 129 other use buildings (commercial or industrial) that also had some housing (9.4%). Of the single family homes 169 were built before 1919, while 81 were built between 1990 and 2000. there were 2,351 apartments in the district. The most common apartment size was 4 rooms of which there were 581. There were 121 single room apartments and 839 apartments with five or more rooms. Of these apartments, a total of 2,023 apartments (86.0% of the total) were permanently occupied, while 197 apartments (8.4%) were seasonally occupied and 131 apartments (5.6%) were empty. , the construction rate of new housing units was 5.3 new units per 1000 residents. The vacancy rate for the district, , was 0.57%. Historic Population The historical population is given in the following chart: Heritage sites of national significance There are nine sites in Appenzell that are listed as Swiss heritage site of national significance. The list includes two farm houses around the village, the Kuenzes farm house at Lehnstrasse 102 and the Horersjokelis House with Barn at Lehn 76. The religious buildings on the list include the Capuchin Monastery Maria der Engel and the Parish Church of St. Mauritius. The secular buildings on the list include the Landesarchiv Appenzell Innerrhoden, the Museum Appenzell, the Rathaus (city hall) and the Castle. Finally, the entire medieval and early modern village of Appenzell was on the list. The entire village of Appenzell is also part of the Inventory of Swiss Heritage Sites. Politics In the 2007 federal election