成人小说亚洲一区二区三区,亚洲国产精品一区二区三区,国产精品成人精品久久久,久久综合一区二区三区,精品无码av一区二区,国产一级a毛一级a看免费视频,欧洲uv免费在线区一二区,亚洲国产欧美中日韩成人综合视频,国产熟女一区二区三区五月婷小说,亚洲一区波多野结衣在线

立即打開
生育高峰與經(jīng)濟(jì)走強(qiáng)往往息息相關(guān),為什么如今美國生育率卻創(chuàng)造了歷史新低?

生育高峰與經(jīng)濟(jì)走強(qiáng)往往息息相關(guān),為什么如今美國生育率卻創(chuàng)造了歷史新低?

David Meyer 2018-05-23
生育率整體下滑帶來的明顯問題就是美國人口的老齡化,更多的老齡人需要社會保障,而繳納社保的年輕人則變得更少。

美國去年誕生的嬰兒數(shù)量是近三十年來最低,總共只有3,853,472人,同比下降2%。

這是美國連續(xù)第三年出生人數(shù)下滑,2017年每一千名15-44歲女性只誕生60.2人的生育率也創(chuàng)造了歷史新低。生育率唯一增長的群體是那些40歲出頭的婦女,而青壯年的生育率暴跌7%,這也意味著比起2007年,如今青壯年的生育率已經(jīng)下滑了55%。

生育率整體下滑帶來的明顯問題就是美國人口的老齡化,更多的老齡人需要社會保障,而繳納社保的年輕人則變得更少。

另一件有趣的事情是生育率下滑和經(jīng)濟(jì)的增長出現(xiàn)了不匹配的現(xiàn)象。原本,經(jīng)濟(jì)好轉(zhuǎn)往往會與生育高峰掛鉤。

根據(jù)美聯(lián)社的報道,專家認(rèn)為生育率下滑也許是因為千禧一代對母親身份的看法出現(xiàn)了轉(zhuǎn)變——本質(zhì)上,他們更傾向于推遲生育,不養(yǎng)那么多小孩——以及長期避孕措施的使用增多所致。

針對30多歲的女性生育率出現(xiàn)輕微下滑的情況,賓夕法尼亞大學(xué)(University of Pennsylvania)的人口學(xué)家漢斯-彼得·科勒對美聯(lián)社表示:“目前很難說這標(biāo)志著根本性的變化還是僅僅一點波動?!边@種下滑表明之前的趨勢出現(xiàn)了扭轉(zhuǎn)。

這些最新的臨時數(shù)據(jù)來自美國疾病控制與防治中心(Centers for Disease Control and Prevention)的全國健康狀況統(tǒng)計中心(National Center for Health Statistics)。

該中心的統(tǒng)計學(xué)家布雷迪·漢密爾頓對《華爾街日報》表示,他“對青少年生育率的持續(xù)下降非常震驚”。這種下滑至少有部分原因在于避孕措施的使用率在青少年中有所增加。(財富中文網(wǎng))

譯者:嚴(yán)匡正?

The U.S. last year saw its lowest number of births in three decades—a total of 3,853,472, which was down 2% from 2016.

This is the third annual decline in a row, and 2017 also saw a record low fertility rate of 60.2 births per 1,000 women aged 15-44. The only group to see birth rates rise was women in their early 40s—the birth rate for teenagers was down a whopping 7%, meaning the teen birthrate is now down 55% from 2007.

The obvious problem stemming from the overall decline is that America’s population is aging, which means more older people who may need a social safety net and fewer younger people to pay into the systems that provide it.

What’s also interesting is the mismatch between the declining birth rate and the economy, which is booming. Good economic times usually go hand-in-hand with baby booms.

According to an AP report, experts say the falling birth rate may be due to millennials’ changing attitudes about motherhood—essentially, they’re more inclined to put it off and have fewer kids—as well as increased use of long-term contraception techniques.

“It’s difficult to say yet whether it marks a fundamental change or it’s just a blip, University of Pennsylvania demographer Hans-Peter Kohler told the AP, in reference to the slight decline in birth rates for women in their 30s. That decline marked a reversal of the previous trend.

The new provisional figures come from the Centers for Disease Control and Prevention’s National Center for Health Statistics.

A statistician at the Center, Brady Hamilton, told The Wall Street Journal that he was “absolutely astounded at the continuing decline in teen birthrates.” That decline appears to be at least partly attributable to teens’ increased use of birth control.

掃描二維碼下載財富APP
久久午夜一级a毛片无码鲁丝片午夜精品| 99精品国产在热久久无码| 么公又大又硬又粗又爽的视频| 亚洲一本大道无码AV天| 国产精品成人va在线观看下载| 最新国产AV无码专区亚洲AVn| 99国产欧美久久久精品蜜桃| 激情小说强奸乱伦亚洲色图| 国产高清a毛片在线看| 国产成人精品一区二三区在线观看| 99久久免费高清热精品6| 中文字幕日韩人妻在线乱码| 国产亚洲精品美女久久久| 在线人成视频播放午夜福利| 午夜精品A片一区二区 | 羞羞动漫美女的胸被狂揉扒开| 日韩女同中文字幕永久在线| 幼香视频在线观看免费| 天天干天天射天天操| 国产成人无码视频一区二区三区| 日韩精品一区二区三区视频在线观看| 亚洲日韩国产AV无码无码精品| 欧美级婬片A片免费播放口r| 亞洲人成網站999久久久綜合| 成人永久免费永久在线播放| 爱看亚洲AV手机在线电影| 亚洲欧美中文日韩V在线观看| 欧美乱人伦中文在线观看不卡| 国产真实交换配乱吟91| 久久成人国产精品免费| 在线永久免费观看黄网站| 亚洲AV成人无码精品网站漫画| 97se狠狠狠狠狼鲁亚洲综合色| 夜夜爽夜夜叫夜夜高潮漏水| 亚洲人成网址在线播放狼友| 精品国产aⅴ无码一区二区| 精品国产高清三级在线观看| 97AV麻豆蜜桃一区二区| 亚洲无线观看国产高清| 国产av午夜精品一区二区入口| 天天摸夜夜摸夜夜狠狠摸|