*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000512121217
Feb003733425801
Mar110176600868
Apr44756800619
May131060978002051
Jun2229791372004373
Jul817171855003580
Aug1181992002011
Sep021517001519
Oct001081001081
Nov0064600646
Dec00271210741347
Total4959241141910271120113