*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00224145
Feb00150621
Mar51820088
Apr3227000275
May49442700525
Jun288750600621
Jul441115000205
Aug14212200138
Sep1014600147
Oct0016600166
Nov00840084
Dec00190168187
Total99197198922152502