most common (17,847 or 3.3%) and Serbo-Croatian is the third (10,645 or 1.9%). There are 4,151 people who speak French and 618 people who speak Romansh. Of the population in the canton, 146,421 or about 26.7% were born in Aargau and lived there in 2000. There were 140,768 or 25.7% who were born in the same canton, while 136,865 or 25.0% were born somewhere else in Switzerland, and 107,396 or 19.6% were born outside of Switzerland. , children and teenagers (0–19 years old) make up 24.3% of the population, while adults (20–64 years old) make up 62.3% and seniors (over 64 years old) make up 13.4%. , there were 227,656 people who were single and never married in the canton. There were 264,939 married individuals, 27,603 widows or widowers and 27,295 individuals who are divorced. , there were 224,128 private households in the canton, and an average of 2.4 persons per household. There were 69,062 households that consist of only one person and 16,254 households with five or more people. , the construction rate of new housing units was 6.5 new units per 1000 residents. The vacancy rate for the canton, , was 1.54%. The majority of the population is centered on one of three areas: the Aare Valley, the side branches of the Aare Valley, or along the Rhine. Historic population The historical population is given in the following chart: Politics In the 2011 federal election, the most popular party was the SVP which received 34.7% of the vote. The next three most popular parties were the SP/PS (18.0%), the FDP (11.5%) and the CVP (10.6%). The SVP received about the same percentage of the vote as they did in the 2007 Federal election (36.2% in 2007 vs 34.7% in 2011). The SPS retained about the same popularity (17.9% in 2007), the FDP retained about the same popularity (13.6% in 2007) and the CVP retained about the same popularity (13.5% in 2007). Federal election results FDP before 2009, FDP.The Liberals after 2009 "*" indicates that the party was not on the ballot in this canton. Part of the GPS Cantonal politics The Grand Council of the canton of Aargau is called Grosser Rat. It is the legislature of the canton, has 140 seats, with members elected every four years. Religion From the , 219,800 or 40.1% were Roman Catholic, while 189,606 or 34.6% belonged to the Swiss Reformed Church.