*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0029550561
Feb002003208411
Mar0150600507
Apr0333500338
May227851000790
Jun0617774001391
Jul527668700968
Aug5749700509
Sep0451900523
Oct0252400526
Nov0030400304
Dec001121622735
Total12118849701313807563