*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00008181
Feb001212437
Mar03650068
Apr12547500501
May3873283001159
Jun13956212001181
Jul1114545500611
Aug4528200291
Sep0326700270
Oct0016000160
Nov00510051
Dec00290233262
Total322010229113384672