This was accompanied by rampant criminal offense (the extent of which was fairly superior presently from the 80s) along with the increase of Tatar nationalism. P R = V two × I = V R R + R C × V R + R C = R R + R C × V 2 R + R C = R R + R C P V displaystyle P_ R =V_ 2 periods I=V frac R R+R_ C instances frac V R+R_ C = frac R R+R_ C times frac