*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00026668
Feb001701532
Mar015690084
Apr04314600189
May26453300680
Jun12219071002273
Jul61101652001759
Aug61113800155
Sep00950095
Oct00900090
Nov00670067
Dec00360210246
Total264005141422915738