????:1???????:????????

2?????95?????

3?????????

4???????????

5??????

?????????????????????10??9?? (??????????????????? ???)????,?,????????????????????

?????9??????,??9????????,??????16.7??????????????????14.4,??

????????????(Alan Vallance)??????????:“??????????????,?????,?????????????”

???????????????????????????????,??220??????????,?????????10??????????????30?????????????????

?????????,29%?,????????????2004??,??16%????????????

???,??,????(??????????) ?????????:????????