| | | | | | | | 18 | | | | | | | | | | | | | | | | | | | | 10 1 12 | 31 | | | | | | | | | | | | 1 1 | 1 | 1 12 31 | | | 200 | 300 400 500 | | | | | | 18 | = 50000 × | = 30000 × | | | | | | 5000 | 5001 10000 10001 20000 | 20001 40% 45% 50% | 55% 45% 50% 55% 60% 50% | 55% 60% 65% 55% 60% 65% 70% | 5 | 5 5 | 1 | 10 | | | | | | | | | | | | | | | | | 컺 | | | | | | 20% | | | | 7 | | | | | | | | | | | 18 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |