“Because of the millions of wage reports Social Security Administration must
record, your earnings for last year may not show up on your record until late
in the current year.”
"SSA receives information from employers and the IRS continuously; therefore the MEF
(Social Security Administration's
Master Earnings File) is updated on a weekly basis."
"사회 보장국 (Social Security Administration)이 수백만 건의 임금 보고서를 기록해야 하므로 작년 수입은 올해 연말까지 기록에 나타나지 않을 수 있습니다."
https://www.ssa.gov/benefits/retirement/planner/wages.html <--- 참조하세요.