the rest of the households, there are 2,848 married couples without children, 2,855 married couples with children. There were 707 single parents with a child or children. There were 182 households that were made up of unrelated people and 247 households that were made up of some sort of institution or another collective housing. there were 1,226 single family homes (or 43.0% of the total) out of a total of 2,850 inhabited buildings. There were 829 multi-family buildings (29.1%), along with 568 multi-purpose buildings that were mostly used for housing (19.9%) and 227 other use buildings (commercial or industrial) that also had some housing (8.0%). , a total of 10,649 apartments (88.2% of the total) were permanently occupied, while 1,094 apartments (9.1%) were seasonally occupied and 331 apartments (2.7%) were empty. , the construction rate of new housing units was 1 new units per 1000 residents. the average price to rent an average apartment in Yverdon-les-Bains was 954.90 Swiss francs (CHF) per month (US$760, £430, €610 approx. exchange rate from 2003). The average rate for a one-room apartment was 570.22 CHF (US$460, £260, €360), a two-room apartment was about 721.96 CHF (US$580, £320, €460), a three-room apartment was about 897.75 CHF (US$720, £400, €570) and a six or more room apartment cost an average of 1638.23 CHF (US$1310, £740, €1050). The average apartment price in Yverdon-les-Bains was 85.6% of the national average of 1116 CHF. The vacancy rate for the municipality, , was 0.49%. The historical population is given in the following chart: Politics In the 2007 federal election the most popular party was the SP which received 29.42% of the vote. The next three most popular parties were the SVP (22.26%), the Green Party (14.34%) and the FDP (9.98%). In the federal election, a total of 5,744 votes were cast, and the voter turnout was 42.2%. Economy , Yverdon-les-Bains had an unemployment rate of 8.2%. , there were 179 people employed in the primary economic sector and about 11 businesses involved in this sector. 2,219 people were employed in the secondary sector and there were 224 businesses in this sector. 10,323 people were employed in the tertiary sector, with 1,119 businesses in this sector. There were 11,191 residents of the municipality who were employed in some capacity, of which females made up 45.2% of the workforce. the total number of full-time equivalent jobs was 10,621. The number of jobs