*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003737
Feb011101224
Mar00240024
Apr3131027001043
May1392171204001560
Jun104631017001184
Jul4872591619002365
Aug733380900915
Sep31434700382
Oct2049600498
Nov1018000181
Dec002207193
Total840590675601208306