*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00016226242
Feb1083361148
Mar01940095
Apr1114400146
May42927100304
Jun13252795001060
Jul115025100312
Aug21617600194
Sep3514300151
Oct00830083
Nov0010400104
Dec00694876949
Total3535422132311633788