*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan43400047
Feb81012021
Mar00031031
Apr00313513151
May001713973521766
Jun0034755416089196
Jul003113867112128
Aug01745327488
Sep0012182221
Oct00030030
Nov00022022
Dec26110190281
Total31279311257271314382