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? 33 % ???? ??????? ?? ??? ??( ??????).
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???? ?????? ?? ??????? ????? ?? ????? 7 % ?? ????? ?????? ???????? ???? ?????? ??? ????????? ??? ????????? ??????? ( ??? ?????????? ???? ???? ?????) ????? ??? ?? ??????? ???? ????? ???? ??????? ??????? ???????? ???? ???? ????? ?? ?????? ??????? ????????? ???? ???????? ?? ??? ????? ?? ??? ?????? ??? ???????.
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????? ?????? ???? ??? ??????? 67 ???? ?????? ?? ???? ??????? ????? ??? ???? 40 ????? ???? ???????? ?????? ?? ????? ????? ???? ????.
???? ??? ?? ?????? ?????? ?????? ????? ?????? ?? ??? ??? ??????? ???????? ??????? ????? ?? ??????? ??????? ?? ????? ??????? ??? ????? 11 % ?? ??????? ??????.
?????? ??????? ????? 1977 ????? ???? ?????? ?????? ??????????? ????? ????? ?????? ?????? ?????? ????? ????? ??????? ????? ????? ????? ??????????? ??? ?????? ??????? ?? ?????? ??????? ??????? ????? ???? ????????? ??????? ?? ??????? ??? ????????? ??????? ????? ???? ?????????? ????? ?????? ??????? ?? ???????? ??????? ??? ??????? ?? ????? ???????/ ??? ?????? ??????? (16000) ?2 .
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