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3. 3. 5 .
4. 4. 5 , 4 4~5 ,
5. 5. 53 53.5 31% 25% 24% 22% 38% . 1km 2km 3km 4km 5km 38.5% 55% 0.5 1.0 1.5 2.0 2.5 3