*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00212184198
Feb1379376162
Mar161619900231
Apr974951000656
May648879000942
Jun1223112245002678
Jul821481030001260
Aug121351000535
Sep11046300474
Oct0023200232
Nov0011110112
Dec017010495576
Total3956396241267558056