*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0008112120
Feb002812857
Mar01450046
Apr04820086
May23216300197
Jun82991343001650
Jul154335100409
Aug1511200118
Sep1513400140
Oct00470047
Nov00460046
Dec00302602634
Total273892381117423550