The period to retrieve statistics for.
LAST_24_HOURS
The last 24 hours, including the current hour.
LAST_7_DAYS
The last 7 days, including today.
LAST_30_DAYS
The last 30 days, including today.
LAST_90_DAYS
The last 90 days, including today.
LAST_12_MONTHS
The last 12 months, including the current month.
