and family to family. The culture is now strongly influenced by American customs and values, largely because the Marianas archipelago (partitioned into Guam and the CNMI) is currently possessed by the United States of America, as organized but unincorporated territories; in addition, most people of Chamorro descent now live outside of the Marianas in the United States. The American military has a major cultural influence among the Chamorro; enlistment rates are higher in the Marianas than in any other place in the USA. On Guam, the enlistment rate is around 14 people per 10,000; by contrast, the US state of Montana, which has the highest per capita enlistment, has a rate near half that, with about eight people per 10,000. (See the Guam page for more details about this topic.) Cockfighting and cockfight-related gambling were introduced by the Spanish and have long been a significant pastime in Chamoru culture, especially among men. It is still popular among the members of older generations and with Filipino immigrants, who raise roosters for cockfighting purposes; however, mixed martial arts fighting competitions have grown in popularity as spectator sports, particularly among the members of more recent generations. Large-scale events are held throughout the year on Guam and Saipan, which feature local competitors and guest participants from abroad. Chamorro life has long centered on one's matriarchal clan. The concept of a "clan" stemming from a common female ancestor is still observed. Large extended families remain central to life in the Marianas. Diabetes and heart disease have become increasingly common among the indigenous population, as well as among nonindigenous Oceanic people living in the Marianas, particularly the Carolinian Refaluwasch. Traditional healers called suruhånu (or suruhåna for women) are still greatly respected for their knowledge of herbal treatments and spirits. Religion Most Chamorros are Roman Catholic and few in the Marianas still maintain some customs and beliefs from the time before the first European conquests; some residents of the Marianas will still ask permission from ancestral spirits before entering parts of jungles. Among the 56 states and territories of the United States, the Mariana Islands have the highest rate of religious self-identification, with a combined percentage of only 1.75% of the population (Guam at 2.5% and the CNMI at just 1%) not claiming membership in or affiliation with a particular religion. Cuisine Chamorro cuisine is influenced by various cultures. Examples of popular foods of foreign origin include