*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000033
Feb001001
Mar01100011
Apr05114700198
May31412215001630
Jun183075118003211
Jul2911171096002242
Aug12541300430
Sep1374000744
Oct1117400176
Nov006006
Dec00011516
Total64566529201188668