*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00122178201
Feb00831668167
Mar0218500187
Apr5725600268
May14408719001141
Jun191880679002578
Jul1245835000820
Aug3123200236
Sep0218600188
Oct0013101132
Nov00680068
Dec00613551615
Total5327582951417986601