*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001639640
Feb012880387676
Mar051012001017
Apr2693200940
May20874500773
Jun322749900558
Jul31544200478
Aug12549900516
Sep83258500670
Oct0047400474
Nov0066500665
Dec001710358529
Total180596312113847936