*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00122178201
Feb00831668167
Mar0218500187
Apr5725700269
May14408725001147
Jun191883685002587
Jul1345935000822
Aug3123400238
Sep0218600188
Oct0013201133
Nov00680068
Dec00613551615
Total5427622967417986622