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In the year 2000, the US census showed that 9.1% of those over 75 had not married so the percentage is relatively low and from 75-84 yrs old, about 50% were still married, 40% were widowed and 5.4 % were divorced.
Manufacturing and Industry has significantly boosted China's economy.
I believe that the strategy you are using when you only read the title, section headings, and captions is called the SQ3R reading method. The abbreviation stands for survey, question, read, recite, and review, and it helps you better understand your assignment.