*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan012718553599
Feb252686240521
Mar512663200709
Apr22610157500902
May1828149200755
Jun235136727001098
Jul21692922001230
Aug301444600490
Sep1443000435
Oct0046301464
Nov0016700167
Dec002372756995
Total94346053862615508365