*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan761200088
Feb150014029
Mar00027027
Apr00042143
May000348462810
Jun00258917812372
Jul005341599945
Aug00730517329
Sep0061733182
Oct00142043
Nov00030030
Dec38900390428
Total4801221195028635326