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.
In 2013, the median household income of Carthage residents was $31,877. Carthage households made slightly more than Coffey households ($31,875), Lake Annette households ($31,875), and Moberly households ($31,726) . However, 29.6% of Carthage residents live in poverty. The median age for Carthage residents is 32.5 years young.