*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003128131
Feb01500101152
Mar0916800177
Apr02944000469
May31941144002088
Jun112770139002920
Jul24637859001520
Aug11431800333
Sep0022200222
Oct00980098
Nov00530053
Dec00280275303
Total495391251935048466