*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00115860
Feb002301639
Mar07920099
Apr01028200292
May610458800698
Jun47183804001034
Jul531917200244
Aug839500106
Sep1210000103
Oct0013400134
Nov00650065
Dec00280216244
Total115328238412903118