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[2025 대한민국] 결혼도, 아이도 싫다는 요즘 세대…40대 남자 4명 중 1명은 ‘총각’…
https://www.wlv.kr/news/articleView.html?idxno=3004065A record-high number of 40-year-olds in the US
https://www.cnn.com/2023/07/01/us/record-number-of-40-year-olds-never-married-trnd/index.html
https://www.pewresearch.org/short-reads/2023/06/28/a-record-high-share-of-40-year-olds-in-the-us-have-never-been-married/sr_2023-06-28_never-married_1-png/