*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004371375
Feb001030109212
Mar11223000243
Apr12517800204
May92132500247
Jun162843700337
Jul63222500263
Aug3117800182
Sep0013000130
Oct0011300113
Nov0011900119
Dec00620365427
Total36567140048452852