<prompt> Translate the following text to EnglishKuanzia miaka ya 1970 hadi katikati ya miaka ya 1990, mapungufu ya serikali ya shirikisho yalichukua sehemu kubwa ya akiba ya kibinafsi na kupunguza kiasi cha akiba ya kitaifa inayopatikana kwa uwekezaji tazama mchoro 4.1.  <response>: From the 1970s through the mid 1990s, federal deficits absorbed a large share of private saving and reduced the amount of national saving available for investment see figure 4.1. 