??:??????????????????

????:?????:???????????

???10??16???? ????(CNN)??????????,?15???????????????,???????????,?,?,?????,??

???,??????????,?????????????????????????2020??????4?,?????????

???????????????,????9???????????????????,?????????????????3???4???????,?14.2%??????,?????2017???1????????

“??????????????,??????????,????”??????????????????????????Bankrate?????????????????????????,“?????????????????????????,???????????????????????,?????????,?????????????”

???,????????????,???

“?????????????,????????????????,???????”????????????????????,“????????,??????????????????????????,??????????????????????????????,?????”

???????????????????,?????????

?????????????????,????2005?,?????????????64%,???57%.

???,???????????????10?????????????????6.4%????????????8.4%,??????????5?????????????????20%? ???????????????:???????????