EIA Natural Gas Storage Data
Total (07/21/17): 2,990 Bcf 
Total (07/14/17): 2,973 Bcf 
Net change: 17 Bcf 
Implied flow: 17 Bcf 
Year ago stocks: 3,292 Bcf
% change from year ago: -9.2 % 
5-year avg stocks: 2,879 Bcf
% change from 5-year avg: 3.9 %