Emphasis. The colon can be used to emphasize a phrase or single word at the end of a sentence. An em dash can be used for the same purpose. In the second example below, an em dash is more common than a colon, though the use of a colon is nevertheless correct.
Lawrenceville, GA Income and Careers. As of 2010-2014, the per capita income of Lawrenceville is $19,178, which is lower than the state average of $25,427 and is lower than the national average of $28,555. Lawrenceville median household income is $42,459, which has shrunk by 1.94% since 2000.
Estimated median household income in 2013: $51,551 (it was $42,063 in 2000) Estimated per capita income in 2013: $21,826 (it was $19,032 in 2000) Nevils-Stilson CCD income, earnings, and wages data. Estimated median house or condo value in 2013: $111,260 (it was $72,400 in 2000) Nevils-Stilson, GA residents, houses, and apartments details.