*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00025962987
Feb033185308634
Mar03256900601
Apr27549200569
May231263554001840
Jun8920991511003699
Jul554701773002298
Aug71170400722
Sep0761100618
Oct0041100411
Nov0038300383
Dec00179211571338
Total1763960750532242714100