*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00018175193
Feb0048160109
Mar00870087
Apr0188900107
May21475128001605
Jun174154193004364
Jul91437149001595
Aug76750088
Sep1510500111
Oct00830083
Nov00780078
Dec00694679752
Total3670951104239149172