*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004126130
Feb113803373
Mar5159000596
Apr291068001079
May749969001025
Jun574761000714
Jul22222400248
Aug7121200220
Sep0113800139
Oct0027700277
Nov0013600136
Dec00320123155
Total101111429442824792