water in the municipality is flowing water. The municipality was the capital of the Yverdon District until it was dissolved on 31 August 2006, and Yverdon-les-Bains became part of the new district of Jura-Nord Vaudois. The municipality of Gressy merged on 1 July 2011 into the municipality of Yverdon-les-Bains. Coat of arms The blazon of the municipal coat of arms is Vert, two Bars wavy Argent, in chief Argent, a letter Y Or. Demographics Yverdon-les-Bains has a population () of . , 34.2% of the population are resident foreign nationals. Over the last 10 years (1999–2009) the population has changed at a rate of 15.2%. It has changed at a rate of 14% due to migration and at a rate of 1.9% due to births and deaths. Most of the population () speaks French (20,134 or 82.6%) as their first language, Serbo-Croatian is the second most common (945 or 3.9%) and Portuguese is the third (859 or 3.5%). There are 551 people who speak German, 717 people who speak Italian and 9 people who speak Romansh. The age distribution, , in Yverdon-les-Bains is; 2,821 children or 10.6% of the population are between 0 and 9 years old and 3,041 teenagers or 11.4% are between 10 and 19. Of the adult population, 3,965 people or 14.9% of the population are between 20 and 29 years old. 3,858 people or 14.5% are between 30 and 39, 3,791 people or 14.3% are between 40 and 49, and 3,138 people or 11.8% are between 50 and 59. The senior population distribution is 2,576 people or 9.7% of the population are between 60 and 69 years old, 1,939 people or 7.3% are between 70 and 79, there are 1,235 people or 4.6% who are between 80 and 89, and there are 228 people or 0.9% who are 90 and older. , there were 9,841 people who were single and never married in the municipality. There were 11,252 married individuals, 1,687 widows or widowers and 1,596 individuals who are divorced. , there were 10,835 private households in the municipality, and an average of 2.2 persons per household. There were 4,201 households that consist of only one person and 634 households with five or more people. Out of a total of 11,082 households that answered this question, 37.9% were households made up of just one person and there were 42 adults who lived with their parents. Of