BC (for "Before Christ") is an abbreviation used to refer to a year before the beginning of the yearcount that starts with the supposed year of the birth of Christ.
Some people use ACN or BCE instead.
See also AD and CE.
... African American, 0.20% Native American, 2.13% Asian, 0.05% Pacific Islander, 3.49% from other races, and 1.95% from two or more races. 11.66% of the population are ...