*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00025187212
Feb1080464149
Mar3210500110
Apr25740081
May32848177003028
Jun237815473008311
Jul163238431003685
Aug22520300230
Sep0720700214
Oct00950095
Nov00730174
Dec00523881936
Total5013940197032113317125