*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001719051922
Feb0275826791441
Mar0212211002232
Apr0251774001799
May186269900779
Jun832050800611
Jul80747000557
Aug18235200372
Sep1023100232
Oct0023900239
Nov0087600876
Dec00473017592232
Total200139859119434313292