*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan553180191591
Feb239612295480
Mar004962526700
Apr00226575101902
May0018249281755
Jun002357271361098
Jul00216922921230
Aug003044614490
Sep0014304435
Oct1004630464
Nov0001670167
Dec756202370995
Total15492694053324608307