*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00212184198
Feb1379376162
Mar161619900231
Apr974951200658
May658879600949
Jun1223112250002683
Jul821481030001260
Aug121351700542
Sep11046500476
Oct0023200232
Nov0011110112
Dec017010495576
Total3966396263267558079