*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00126347374
Feb001575150312
Mar1524600252
Apr141026100285
May171240738001995
Jun1937051409005133
Jul81213801002022
Aug21426000276
Sep01032000330
Oct0222300225
Nov0015800158
Dec001067772885
Total616199468038126912247