<prompt> Translate the following text to EnglishKama inavyoonekana katika takwimu ya 2.3, Uhifadhi wa jumla wa kitaifa wa Japani kama sehemu ya Pato la Taifa umekuwa ukiwekwa kwa mfululizo juu zaidi kati ya nchi za G7.  <response>: As figure 2.3 shows, Japans gross national saving as a share of GDP has consistently ranked the highest among the G-7 countries. 