*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002119661987
Feb0464436221273
Mar2171373001392
Apr3141352001369
May4392445002488
Jun5422129002176
Jul1121428001441
Aug251096001103
Sep0186000861
Oct0161000611
Nov0049400494
Dec00311010471358
Total171351274224363516553