Before revision: The U.S. Census recognizes the difference between the terms sex and gender, the fact they are often confused or used interchangeably, and may differ across cultures and time, and explains that what the census attempts to measure, is "the sex composition of the population ... ".
After revision: The U.S. Census recognizes the difference between the terms sex and gender, the fact they are often confused or used interchangeably, and may differ across cultures and time, and explains that what the census attempts to measure, is "the sex composition of the population ".