*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002188190
Feb004904190
Mar171172001180
Apr8432148002199
May503813756004619
Jun13152312718008080
Jul683902483002941
Aug14191369001402
Sep2492000926
Oct1030900310
Nov00970097
Dec00671552620
Total275950712088378122654