*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00115860
Feb002301639
Mar07920099
Apr01027900289
May610458300693
Jun47182803001032
Jul531817100242
Aug839500106
Sep1210000103
Oct0013400134
Nov00650065
Dec00280216244
Total115326237412903106