As of 2001 Tatar was considered a potentially endangered language while Siberian Tatar received "endangered" and "seriously endangered" statuses, respectively. Higher education in Tatar can only be found in Tatarstan, and is restricted to the humanities. In other regions Tatar is primarily a spoken language and the number of speakers as well as their proficiency tends to decrease. Tatar is popular as a written language only in Tatar-speaking areas where schools with Tatar language lessons are situated. On the other hand, Tatar is the only language in use in rural districts of Tatarstan.