| | | | | | | | | | | | | 50 | | | | | | | | | 2002 | 1992 31% | 1.6 | 300 | | 12 | 2.4 | | | 6 | | ① | | ② | | ③ 20 3 10 | 1.5 | ④ | | ⑤ | | ⑥ | ᠃ | | 99% | 90% | | | | | | | | | | | | | | | 42 | 2007 25-30 | | | | | | | ① | ② | | | ③ ④ | | | | ⑤ | | |