period period_abbr period_name M01 JAN January M02 FEB February M03 MAR March M04 APR April M05 MAY May M06 JUN June M07 JUL July M08 AUG August M09 SEP September M10 OCT October M11 NOV November M12 DEC December M13 AN AV Annual Average Q01 QTR1 1st Quarter Q02 QTR2 2nd Quarter Q03 QTR3 3rd Quarter Q04 QTR4 4th Quarter Q05 AN AV Annual Average