*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00014546
Feb001601430
Mar02019400214
Apr1919300203
May45173500556
Jun6253268002606
Jul71073576001656
Aug5211800125
Sep00700070
Oct00460046
Nov00240024
Dec00806371
Total234153134811225647