*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00029092
Feb013113366
Mar03620065
Apr05750080
May12019900301
Jun2548830900822
Jul5317459300820
Aug173523400286
Sep1115200154
Oct0010000100
Nov00730073
Dec00150139154
Total97908174332623013