*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005555
Feb002202345
Mar6042100427
Apr3302885002918
May251563368003549
Jun711272125002323
Jul54634700407
Aug10258400596
Sep0147500476
Oct0041600416
Nov0021700217
Dec00251127153
Total16932210885120511582