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???? ????? ????? ??? ???????? ??? ??? ????? ?? ????? ??????? ???? ????????? ?? ??????? ????????? ??????? ??? ??? ?????? ??????? ?????????? ??????? ??????? ??? ??????? ???? ????? ????? ???????? ???? ??? ????????? ???????? ???? ??????? ?????? ??? ???? ?? ????????????? ???????. ?????? ????? ??? ?????? ?????? ??? ?????? ?????? ?? ???? ?? ??????? ???? ?? ??????? ????.

??? ??? ?????? ???? ???? ??? ????? ?????? ?????????? ??????? ?????? ?????? ???????? ?? ??????? ??? ???? ???????? ??????? ????? ??????? ?????????? ????????? ????????? ?????? ????????? ??? ????? ???? ???? ??????? ?????? ??? ??? ???? ????? ???????? ?????? ??????.

???? ???????? ?????? ??? ????? ?? ???? ??? ??? ????? ??????? ????? ??????? ??? 1949 ??? ???? ????? ???? ?? ??????? ?????????? ????? ????? ??????? ???????? ??? ?????? ???? ???? ???? ?????? ??? ????? ??????? ????? ??????.

???? ?? ?????? ??????? ?? ??? 1965 ??? ??? 1980 ? ??? ????? ????? ????? ?????? ??? ???? ??? ?? ?? ?? ??? ?? ????? ?? ??? ?????? ??????? ????? ?????? ????????? ???? ???? ????? ??????? ?????? ?????? ???????? ????? ??? 6,4% ????? ???? ?????? ?? ??? 1965 ??? ??? 1980? ?????? ??????? ??? ????? ???? ??? 2,7% ???????? ???????? ???? 3,7% ????? ?????? ?????? ???? 5,4% ?????????? ?????? ?????? ???? 6,1% ?????????? ?????? ????? ???? ??? ??????(????: ????? ??????? ????? ?? ??????? ?? ?????? 1990? ?? 212? 213).

??? ??? ???? ???? ??? ??? ????? ???? ????? ???????? ??? ???????? ??????? ????? ??? ?????? ?? ???? ?????? ????? ???????? ????? ???????? ?? ???? ?????? ????????? ??????? ??? ????? ??????? ????????? ???????? ????? ??? ????????? ?????? ????? ?????? ?? ???????? ????? ??????? ?? ??????? ??? ?????? ??????????? ??? ?? ???? ?? ???? ????? ??????? ???????.

????? ????? ?????? ??????? ?????? ????? ????? ??????? ???????? ??? ?????? ?????????? ???? ??? ????? ?? ???????? ????????? ??? ???? ????????????? ???????.

???? ???????? ?????? ??? ??? 1980 ???? ????? ????? 10% ?????? ?? ??????? ??? ???? ???? ?? ????? ???? ????????? 34 ????? ?????? ????? ????? ???? ???? ?????? ?? ?????? ????? ???? ????? ????? ??????? ???????? ???????? ?????? ?????? ?????? ??????? ??????????? ????????? ????????? ??? 2008 ??? ???????? ?????? ???? ??????? ???? ??? ???????? ??????? ?????? ?? ?????? ???????? ??? ??????? ???????? ??????? ???? ??????? ????? ??? ???? ??? ???.

??? ??? ?????? ?????? ?????? ?? ??? ???? ???? ???????? ?????? ????? ??????? ?????? ????? ?????? ?? ?????? ??? ??? ????? ?????? ?? ?????? ???????? ???? ?????? ????? ????????? ???? ????? ????? ??? ??????? ??????? ?? ??????. ?????? ?????? ??????? ??? ????? ?? ??????? ???????? ?? ???? ???? ????? ?????? ???? ???? ??? ????? ?????????? ??????? ???.