*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00018175193
Feb0048159108
Mar00860086
Apr0188800106
May21475126001603
Jun174151192004360
Jul91437149001595
Aug76720085
Sep1510200108
Oct00830083
Nov00770077
Dec00694678751
Total3670921092239129155