*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001271272
Feb20104077183
Mar541160001169
Apr1192083002103
May71581996002161
Jun461851904002135
Jul621438100457
Aug17222800247
Sep1045900460
Oct0059000590
Nov0034900349
Dec00790446525
Total1413829333179410651