*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00028183211
Feb1080760148
Mar3210101107
Apr25720079
May32845177003025
Jun237788473008284
Jul163202430003648
Aug22520300230
Sep0720700214
Oct00940094
Nov00730174
Dec00523881936
Total5013874196238112617050