<prompt> Translate the following text to EnglishKwa upande mwingine, tangu mwaka wa 1992, kuokoa kwa taifa la Marekani kumekuwa na mwelekeo wa kuongezeka huku uwekezaji wa ndani ukiongezeka.  <response>: In contrast, since 1992 there has been an upward trend in U.S. national saving while domestic investment has surged. 