*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013872885
Feb012140289504
Mar02180900830
Apr3532280002336
May151073194003316
Jun222943915004231
Jul17731694001784
Aug981336001353
Sep371629001639
Oct111126001128
Nov0062300623
Dec00319211411462
Total705651713915230220091