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
S01	HALF1	First Half
S02	HALF2	Second Half
S03	AN AV	Annual Average