*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001404405
Feb00990140239
Mar0426700271
Apr1722100229
May72632600296
Jun163313500382
Jul66223300301
Aug4124200247
Sep0018700187
Oct0013800138
Nov0015600156
Dec00770431508
Total34668168119753359