Thanks to really low and fully flexible Sixt rental car rates I made a few bookings. It appears that the booking numbers are sequential. Should I start graphing how many cars Sixt is renting out per minute/hour/day?

Thanks to really low and fully flexible Sixt rental car rates I made a few bookings. It appears that the booking numbers are sequential. Should I start graphing how many cars Sixt is renting out per minute/hour/day?