However, Laos is a multi-ethnic country with a large proportion of non-Buddhist groups that adhere to religions that are often subsumed under the denominator "animism", but that can also substantially overlap with Buddhism, or a least contain Buddhist elements resulting from cross-cultural contact. The percentage of the population that adheres to Buddhism in modern Laos is variously reported, the CIA World Factbook estimates 66% of the total population identify as Buddhist. Although this overall number is likely to be correct, there are large variations from province to province. Ethnic minority provinces like Sekong had only a quota of 20% of Buddhists in 2005, while provinces largely populated by ethnic Lao like Champassak reach 92% in the same year. There are also some Chinese or Vietnamese Mahayana Buddhists, primarily in urban centers.