*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000166166
Feb003603874
Mar00710071
Apr11658400601
May115189517005717
Jun731061210420011727
Jul5111382924004113
Aug5121700001717
Sep281411001421
Oct0020600206
Nov00260026
Dec00320269301
Total143169758549047326140