The Chamorro language is threatened, with a precipitous drop in language fluency over the past century. It is estimated that 75% of the population of Guam was literate in the Chamorro language around the time the United States captured the island during the Spanish–American War[4] (there are no similar language fluency estimates for other areas of the Mariana Islands during this time). A century later, the 2000 U.S. Census showed that fewer than 20% of Chamorros living in Guam speak their heritage language fluently, and the vast majority of those were over the age of 55.