*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00027763790
Feb023474312665
Mar3751482001560
Apr52331853002091
May175991153006161
Jun79185542770018910
Jul47794523620010354
Aug261894300987
Sep161096001103
Oct0194700948
Nov0038400384
Dec011561739897
Total178328261000032181444850