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*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000694100
Feb002212952
Mar12410044
Apr102241000442
May78873800833
Jun173071648001972
Jul4610459100741
Aug121534100368
Sep0826700275
Oct00710071
Nov00380038
Dec00311477509
Total93546419886005445