the total) out of a total of 231 inhabited buildings. There were 24 two family buildings (10.4%), 11 three family buildings (4.8%) and 6 multi-family buildings (or 2.6%). There were 254 (or 20.9%) persons who were part of a couple without children, and 766 (or 63.0%) who were part of a couple with children. There were 50 (or 4.1%) people who lived in single parent home, while there are 11 persons who were adult children living with one or both parents, 4 persons who lived in a household made up of relatives, 10 who lived in a household made up of unrelated persons, and 36 who are either institutionalized or live in another type of collective housing. The vacancy rate for the municipality, , was 1.36%. , the construction rate of new housing units was 2.4 new units per 1000 residents. there were 483 apartments in the municipality. The most common apartment size was the 6 room apartment of which there were 142. There were 7 single room apartments and 142 apartments with six or more rooms. the average price to rent an average apartment in Birwinken was 1133.55 Swiss francs (CHF) per month (US$910, £510, €730 approx. exchange rate from 2000). The average rate for a one-room apartment was 900.00 CHF (US$720, £410, €580), a two-room apartment was about 743.00 CHF (US$590, £330, €480), a three-room apartment was about 970.00 CHF (US$780, £440, €620) and a six or more room apartment cost an average of 1435.33 CHF (US$1150, £650, €920). The average apartment price in Birwinken was 101.6% of the national average of 1116 CHF. In the 2007 federal election the most popular party was the SVP which received 56.36% of the vote. The next three most popular parties were the Green Party (11.74%), the CVP (9.65%) and the SP (8.6%). In the federal election, a total of 462 votes were cast, and the voter turnout was 53.1%. The historical population is given in the following table: Economy , Birwinken had an unemployment rate of 0.93%. , there were 171 people employed in the primary economic sector and about 56 businesses involved in this sector. 53 people are employed in the secondary sector and there are 15 businesses in this sector. 97 people are employed in the tertiary sector, with 32 businesses in this sector. there were 852 workers who lived in the municipality. Of these, 424 or about