*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00122124
Feb002013
Mar1914450078
Apr41449400179
May1085718700352
Jun13412556600825
Jul775227400403
Aug154027000325
Sep1515500161
Oct00580058
Nov00110011
Dec00703340
Total39533716702552459