ex. B07401. A full list of variables can be found here
All States: 01,02,04,05,06,08,09,10,11,12,13,66,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,72,44,45,46,47,48,78,49,50,51,53,54,55,56
Your API key here
This connects to the US Census Bureau API, please review the Census documentation