*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000146146
Feb0055056111
Mar01518900204
Apr015634200498
May265057400650
Jun147879100883
Jul62335600385
Aug1111800120
Sep00800080
Oct00880088
Nov00890089
Dec00651277343
Total47323274714793597