*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005050
Feb0190717
Mar00540054
Apr11285100864
May1701465001536
Jun18661089001173
Jul221158400617
Aug20238900411
Sep2042900431
Oct0048000480
Nov0019900199
Dec00410133174
Total64162559001906006