*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00024154178
Feb1079459143
Mar329900104
Apr25710078
May32844171003018
Jun207775465008260
Jul163201430003647
Aug22520100228
Sep0720500212
Oct00860086
Nov00730073
Dec00523712767
Total471385919323192516794