*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003434
Feb102202346
Mar0156600567
Apr2559900606
May22101092001124
Jun70341933002037
Jul16592100942
Aug3244700452
Sep3024700250
Oct0023700237
Nov0012700127
Dec00390111150
Total11757623001686572