According to unverified accounts, the gunpowder was later used at the Battle of Bunker Hill, transported there by Major Demerit, who was one of several New Hampshire patriots who stored the powder in their homes until it was transported elsewhere for use in revolutionary activities. During the raid, the British soldiers fired upon the rebels with cannon and muskets. Although there were apparently no casualties, these were among the first shots in the American Revolutionary period, occurring approximately five months before the Battles of Lexington and Concord. The United States Constitution was ratified by New Hampshire on June 21, 1788, when New Hampshire became the ninth state to do so. New Hampshire was a Jacksonian stronghold; the state sent Franklin Pierce to the White House in the election of 1852. Industrialization took the form of numerous textile mills, which in turn attracted large flows of immigrants from Quebec (the "French Canadians") and Ireland. The northern parts of the state produced lumber, and the mountains provided tourist attractions. After 1960, the textile industry collapsed, but the economy rebounded as a center of high technology and as a service provider. Starting in 1952, New Hampshire gained national and international attention for its presidential primary held early in every presidential election year. It immediately became the most important testing grounds for candidates for the Republican and Democratic nominations. The media gave New Hampshire and Iowa about half of all the attention paid to all states in the primary process, magnifying the state's decision powers and spurring repeated efforts by out-of-state politicians to change the rules. The United States Census Bureau estimates the population of New Hampshire was 1,359,711 on July 1, 2019, a 3.28% increase since the 2010 United States Census. The center of population of New Hampshire is in Merrimack County, in the town of Pembroke. The center of population has moved south since 1950, a reflection of the fact the state's fastest growth has been along its southern border, which is within commuting range of Boston and other Massachusetts cities. The most densely populated areas generally lie within of the Massachusetts border, and are concentrated in two areas: along the Merrimack River Valley running from Concord to Nashua, and in the Seacoast Region along an axis stretching from Rochester to Portsmouth. Outside of those two regions, only one community, the city of Keene, has a population over 20,000. The four counties covering these two areas account for 72% of the state population, and one (Hillsborough) has nearly 30% of the state population, as well as the two most populous communities, Manchester and Nashua.