The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB, but sometimes MByte is used. The unit prefix mega is a multiplier of 1000000 (106) in the International System of Units (SI). Therefore, one megabyte is one million bytes of information.
65 years and over: 15.25% (male 21,895,128/female 27,525,255) (2016 est.) Definition: This entry provides the distribution of the population according to age. Information is included by sex and age group (0-14 years, 15-64 years, 65 years and over).
In 2012, the U.S. population was approximately 309 million. About 20.6 million, or 6.6 percent, are children in the 10 to 14 age range, and 21.2 million, or 6.9 percent, are in the 15 to 19 age range. The margin of error is near 30,000. As of 2012, another 40 million children are newborn to age 9, which is about 13 percent of the population.