*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001515
Feb0050510
Mar2381094001134
Apr171072774002898
May1021873509003798
Jun1221843013003319
Jul62651659001786
Aug16261401001443
Sep351018001026
Oct1054800549
Nov0013800138
Dec011903757
Total3256131517805716173