18.6 10.1 9.4 ํŒœ/ํด๋กœ๊ทธ๋ฆฝ์ธ๋ฐ ํŒŒ๋”ฑ์ด ๋žŒ์ฃผ ์œ ์ถ”์ฒœํ•ด์ค˜์„œ ํฌ๊ธฐ ๋น„๊ต์‚ฌ์ดํŠธ์—์„œ ์ฐพ์•„๋ณด๋‹ˆ๊นŒ ๋ฐํ•˜์Šค๋„ ๊ดœ์ฐฎ์•„๋ณด์ด๊ณ  ๊ณ ๋ฏผ์ด๋…ธ