. . . 4 ɡ .
. . 70 27 . . . . . . . - 36 -123 . - .





















. ֡ . 0.75% ֡ Ρ . 95% 3% 1.6% . 2000 Ρ . .
















12 . ֡ . "" " " "" "" "". " " ȡ . "" 60 .
2003 ϡ . ɡ . . ɡ 3 ڡ ϡ .