*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001521062121
Feb47778138571659
Mar109551942002106
Apr3591091641002109
May323881770002181
Jun3351542137002626
Jul333822346002761
Aug33221439001494
Sep271296001305
Oct101230001231
Nov0064800648
Dec00533215562091
Total14995241576030451922332