*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001515
Feb0050510
Mar2381094001134
Apr171092776002902
May1021993515003816
Jun1221843013003319
Jul62651661001788
Aug16271403001446
Sep351020001028
Oct1054800549
Nov0013800138
Dec011903757
Total3256281519205716202