*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00122124
Feb002013
Mar1914460079
Apr41449500180
May1085919000357
Jun13612556600827
Jul795227700408
Aug154027100326
Sep1515600162
Oct00580058
Nov00110011
Dec00703340
Total39933916802552475