*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00027779
Feb002201739
Mar09710080
Apr03117200203
May26743600712
Jun13227767002357
Jul81185701001894
Aug81420200224
Sep0013000130
Oct0010600106
Nov00900090
Dec00420220262
Total314190163923146176