*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011321332
Feb00970135232
Mar0315600159
Apr102321700250
May526433800454
Jun14515752000822
Jul18920247700868
Aug504834000438
Sep5226600273
Oct2024500247
Nov0119000191
Dec001175493615
Total4535002963169494881