2,125 people or 12.6% are between 50 and 59. The senior population distribution is 1,324 people or 7.9% of the population are between 60 and 69 years old, 1,074 people or 6.4% are between 70 and 79, there are 617 people or 3.7% who are between 80 and 89, and there are 90 people or 0.5% who are between 90 and 99, and 2 people or 0.0% who are 100 or more. there were 2,251 persons (or 13.4% of the population) who were living alone in a private dwelling. There were 3,870 (or 23.0%) persons who were part of a couple (married or otherwise committed) without children, and 9,167 (or 54.5%) who were part of a couple with children. There were 870 (or 5.2%) people who lived in single parent home, while there are 98 persons who were adult children living with one or both parents, 82 persons who lived in a household made up of relatives, 97 who lived household made up of unrelated persons, and 370 who are either institutionalized or live in another type of collective housing. In the 2007 federal election the most popular party was the SVP which received 36.7% of the vote. The next three most popular parties were the CVP (26.3%), the SP (13.9%) and the FDP (12.2%). The entire Swiss population is generally well educated. In Gossau about 68.9% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule). Out of the total population in Gossau, , the highest education level completed by 3,808 people (22.7% of the population) was Primary, while 6,416 (38.2%) have completed Secondary, 1,678 (10.0%) have attended a Tertiary school, and 670 (4.0%) are not in school. The remainder did not answer this question. The historical population is given in the following table: Heritage sites of national significance The Former Rubberband Factory at Stadtbühlstrasse 12 is listed as a Swiss heritage site of national significance. Both the village of Gossau and the Kulturlandschaft Matten/Wilen/Zinggenhueb (Cultural region Matten/Wilen/Zinggenhueb), which is shared between Gossau and Andwil, are designated as part of the Inventory of Swiss Heritage Sites. Sights The Catholic parish church of St. Andreas was built in 1732 by Jakob Grubenmann. It was lengthened to the west and renovated in 1925. It is a single-nave church with a transept and an oval dome over the crossing. The