*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001212
Feb003047
Mar00210021
Apr317997001017
May102937576003523
Jun443297584003925
Jul32244986001262
Aug7369300703
Sep0128100282
Oct00450045
Nov2090011
Dec00501722
Total986499420003310830