????? ????????? ?? ??????? ????????? ??????????? ???????????? ?? ??????? ?????? ???, ?? ?????? ??????? ????? ???? ?? ??????? ??? ????????, ??????, ???????, ?????? ??? ????? ??????????? ???????? ??? ???????????????? ???????? ?????. ??????? ???????? ????? ??????????? ?????? ??????? ????? ????, ?? ???????? ????????????? 15% ?? 30% ????. ??????? ??????????? ????? ??? ??????????????, ????????????, ?????????????, ????????????, ??????? ??????? ??? ??????? ??????? ????. ????????, ??????????? (???????????? ???????) ?????? ???????? ????, ?? ???? ??????? ????????????? 60% ?? 80% ????, ???????? ?????????????? ???? ??? ??? ??????? ????????????? ??????? ??? ??????? ???.