*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00026567
Feb001601733
Mar08670075
Apr02914400173
May26153500652
Jun12212866002206
Jul61102645001753
Aug81114500164
Sep00970097
Oct00880088
Nov00660066
Dec00370210247
Total283893140622925621