Since it peaked at the end of March. Here are the numbers:
Total on March 31: 1227.7m; 
by Sept 22, 1145.6m. Dropped 82.1m. This number will soon reach 100m.

Commercial crude on March 31: 535.5m
By Sept 22, 471m. Dropped 64.5m

US has released 21m barrels of crude from SPR since March 3. Without such release, commercial crude inventory would have dropped 85.5m barrels.