<prompt> Translate the following text to EnglishKiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee: Kiwango cha mapato ya watu wazee.  <response>: Wealth-Income Ratio 1960-2000 28 Figure 1.3:Family Net Worth by Income Level in 1998 33 Figure 1.4:Share of Elderly Households Income by Source of 