*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013123136
Feb013724383
Mar08790087
Apr07116800239
May01261328001589
Jun184253392004663
Jul171370261001648
Aug51519900219
Sep1812300132
Oct01720073
Nov00400040
Dec00455645695
Total4169881744208119604