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1999?? ??þ???????? ??? ??????????? ?μ??????, ????????, ??þ??????, ?????????, ??þ?????? ?? 4???? ??????.
????(?????, ???, ????, ???)?? ???, ???ι?, ?????, ?ε? ?????? ??????? ??????, ????? ??? ??????? ????????? ??? ??????? ????.
??u ??????? ?? 30% ????? ?????????? ?????? ??????, ????? ?? ???????? ?? ???????? ???????? ?? 70% ??????.
??o : ??????????