| | | 6 | | | 7 4 | 8.9 20.3 44.0 | 12.2% 27.8% 60.1% | 6 | | 20 | | | | 10 | 10—20 | 20 % 60% | | 20% | | | | | 1000 \ | | 3000 \ | 1000—3000 |