*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00122124
Feb002013
Mar1914450078
Apr41439400178
May1085618700351
Jun13312556600824
Jul775227400403
Aug154027000325
Sep1615400161
Oct00580058
Nov00110011
Dec00703340
Total39433616692552456