*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00024128152
Feb0061246109
Mar0623000236
Apr35348800544
May514320891005262
Jun1171777814280019323
Jul955580997106673
Aug233751300573
Sep31137300387
Oct0015600156
Nov00540054
Dec00445568617
Total2922778552353274234086