*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004197201
Feb00150064214
Mar171651001659
Apr5191375001399
May37761372001485
Jun431311090001264
Jul31819000229
Aug7222100230
Sep0126800269
Oct0029500295
Nov0018300183
Dec00690382451
Total124244686446437879