????? ??? ????
?? ????? ???? ??????? ??????? ?? ????????? ?? ????? ??????? ??? ?? ??? ???????? ?????? ??????? ??? 1953? ???????? ???? ??? ?? ??? 1957? ??? ??? 1979 ?? ????????? ??????? ???? ????? ??????.
????? ?????? ????? ???? ??? ???? ?? ?????????? ???????? ??????? ????????? ????? ?????? ??????? ?????? ??? ????? ??????? ??? ????? 1951? ???? ??????? ???????????? 2,000 ??? ???? ?? ??????? ??????? ??????? ?? ???? ??? ????? ?? ??? ??????? ?? ?????? ????? ?? ???? ??????? ??????.
???? ?? ????????? 1.7 ????? ????? ?? ??????? ???????? ????? ??????? ????? ??????? ??????. ???? ??????? ??????? ?????? ?? ?????? ????? ????? ?????? ??????? ??? ??????. ??? ????? ??????? ???? ???? ????? ?? ????????? ??? ???? ???????? ????? ??????? ?????? ??????. ???????? ????? ????? ???? ?????? ??????? ??? ????? ??? ????? ????? ??????? ??????? ????? ???? ?? ???????? ???? ????? ???????.
?? ????? ?????? ?????? ?? ??? ?????? ?????? ?????????? ??? ????? ???????? ????? ???? ?????? ?????? ?????? ????? ????? ??????? ?????? ??.