*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan53201056
Feb110217030
Mar0052371243
Apr00142813442
May009462131602
Jun0034591163788
Jul003413614184
Aug001075287
Sep0012000201
Oct0001720172
Nov0001100110
Dec26900340303
Total33329624633243218