From the cdc:
a total of 10, 528 TB cases (a rate of 3.
4 cases per 100, 000 persons) were reported in the United States in 2011. Both the number of TB cases reported and the case rate decreased; this represents a 5.8% and 6.4% decline, respectively, compared to 2010. The number of reported TB cases in 2011 was the lowest recorded since national reporting began in 1953.