??? ?????? ???????? ?????? ??????? ????? ????? ???????? ???????? ????????? ?????? ?????? ?????????. ?? ??? ??????? ??? ????? ??? ?????? 1973 ???? ?????? ???????? ??????? ????? ?????? ?????? ?? ??????? . ??????? ????? ?????? ????? ?? ????? ??????? ???????? ???????? ????? ????. ???? ????? ?????? ?? ???? ???? ?????? ??????? ????? ????? ?????? ???

?? ????? ??? ????? ????? ?? ??? ??????? ? ?? ????? ?????? ??? ????? ????? ???? ????? ??? ???????? ? ?? ?? ??? ????? ???? ????? ?????? ????? ?? ????? ??? ???????? . ?????? ???? ??? ?????? ??????? ??? ????? ?? ??????, ???? ???????? ??? ????? ?????? ??? threshold ?? ?????? ?????. ???????? ?????? ???????? ??????. ?????| estão ???? ??????? |