Final answer:
As of Census 2000, people originally from Mexico accounted for approximately 30 percent of the total U.S. foreign-born population, highlighting a shift from European to Latin American immigration patterns.
Step-by-step explanation:
The question pertains to the composition of the U.S. foreign-born population according to Census 2000. By the 2000s, about half of U.S. immigration originated from the rest of the Americas, with Mexico being the standout contributor. As the data suggests, people originally from Mexico accounted for approximately 30 percent of the total U.S. foreign-born population during that time period. This shift exemplifies the changing demographics of the United States, which saw a decrease in European immigrants from 90% in the early 20th century to less than 20% by the century's end, while the proportion of immigrants from Latin America, particularly Mexico, grew substantially.