*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004351355
Feb00113095208
Mar7673100744
Apr2231956001981
May11861310001407
Jun188785700962
Jul30922600265
Aug6735500368
Sep0145400455
Oct0050100501
Nov0022200222
Dec00741514589
Total74219679959608057