*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011710721
Feb002221249472
Mar0844600454
Apr1642300430
May72870800743
Jun279578900911
Jul421230100355
Aug19432000343
Sep8345600467
Oct1047400475
Nov2142600429
Dec0018828661056
Total10715747531418256856