*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004117441785
Feb0377825621345
Mar0242128002152
Apr2261544001572
May206259300675
Jun752444200541
Jul48740200457
Aug9227500286
Sep0019400194
Oct0024900249
Nov0071500715
Dec00345014271772
Total154148766543373311743