*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00024128152
Feb0061246109
Mar0623000236
Apr35348900545
May514324918005293
Jun1171782714430019387
Jul955581997106674
Aug233752600586
Sep31137300387
Oct0015600156
Nov00540054
Dec00445568617
Total2922783952913274234196