SK????? ?? ????? ???? ??? ????? ??? ?? ??? ??????. SK????? ??? 4??(10~12?) ????? 550? ??? ??? 3??(7~9?) 240? ? ???? ??? ????? 30? ???. ???? 2?7184? ??? 3??(7~9?)?? 12.2%, ?? ?? ?? 6.5% ????.
4?? ????? ??? ??? ????? ?????? ????? ???, ????? ??? ???? D? ??? ???? ??? ????. SK????? 4?? D? ???? 3?? ?? 28% ???.
??? ?? ??? ??? ???? ????(970? ? ??)?? ??? ???. ?-?? ?? ????? ?? ????. SK????? 4?? ???? ?????? ???? ??? ?? ???? ?? ????? ??? ??? ???. SK????? ??? 10?1620? ? ??? ???? 2270? ?, ??? 1590? ?? ??.