1. A method for statistics mode reloading and statistics acquisition according to statistics classes in storage of data in a postage meter machine which can communicate with a data center located remote from the postage meter machine, the method comprising the steps of: (a) operating said postage meter machine to conduct frankings and causing said postage meter machine to enter into a statistics mode wherein data associated with said frankings are stored in respective statistics classes; (b) forming freely selectable new statistics instruction data at said data center for a future statistics mode, said instruction data including instructions for forming new statistics classes and for pre-compression of statistics mode data; (c) establishing communication between said postage meter machine and said data center and transmitting said data in said statistics classes from said postage meter machine to said data center, and transmitting said new statistics instruction data from said data center to said postage meter machine; (d) transmitting an instruction from said data center to said postage meter machine to cause said postage meter machine to non-volatilely store said new statistics instruction data in said postage meter machine; and (e) operating said postage meter machine to conduct further frankings and causing said postage meter machine to enter into said statistics mode wherein data associated with said further frankings are pre-compressed, stored in respective statistics classes, and interpreted according to said new statistics instruction data.