TY JOUR TI Socio-economic study of the consumption of educational services in Russia from 2000 to 2025. KW education KW student enrollment KW population demographics KW general education KW secondary vocational education KW higher education JO Journal of Applied Research AU Rogachev, V.V. AU Osetrova, M.V. AU Minakova, V.M. AU Minkova, A.S. PY 2026 IS 0 PB ITBO University