*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00017888905
Feb103594371735
Mar0657600582
Apr0648200488
May3661500624
Jun131443200459
Jul20038300403
Aug7256300572
Sep0276700769
Oct011556001557
Nov101221001222
Dec00406127231141
Total453773603319829457