Ngokukhawuleza i-55% ikhuphe ukuthengwa kwakho kokuqala
1964, ubungqina besilivere 1992–2018: 90% yesilivere, 10% yobhedu.; Ubungqina besilivere 2019–: 99.9% yesilivere ngo-1965-1970, ezinye iingqekembe ze-1776-1976 zaseSan Francisco-minted: umaleko wangaphandle we-80% yesilivere, i-20% yobhedu ejikeleze i-79% yobhedu, i-21% yesilivere, iyonke i-60% yobhedu, i-40% isilivere.; Uqhankqalazo lokujikeleza, ngo-1971 ukuza kuthi ga ngoku: umaleko wangaphandle we-75% yobhedu, i-25% ye-nickel ejikeleze i-core ye-100% yobhedu.
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