سؤال قراءة ستيب محلول — فهم التفاصيل (تدريب 8090)

Line chart, y-axis "Average life expectancy at birth (population-weighted)", 40 to 75 years; x-axis years 1960 to 2010. Four lines per the legend: Latin America, South East Asia, South Asia, Sub-Saharan Africa. Latin America's line is highest throughout, rising from about 56 years in 1960 to about 74-75 years in 2010 (an increase of almost 20 years). Sub-Saharan Africa's line is lowest throughout, reading about 45 years around 1970, with a visible plateau over roughly 1985-2000 before resuming its rise.