*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001717
Feb0080412
Mar12043800459
Apr62248700515
May146284300685
Jun385314700616
Jul174120500263
Aug5314000148
Sep0117100172
Oct0012100121
Nov00210021
Dec00801523
Total81124616890363052