The first thing to do when looking back at records or graphs is to select the range of dates you wish to look at. The first field in the Statistics window is the View field, which allows you to select the range of dates you are interested in:
The default view is always one month's worth of records up to today's date. If you wish to view more records or records only within a specific date range, tap on the View field to bring up the View Range window:
The View Range window presents you with a set of pre-defined ranges as well as a Custom field where you may select a specific range of dates:
To choose a date range, spin the dials to the earliest date you are interested in. Then touch the lower "To" field and spin the dials to the latest date you are interested in.
When you are finished, touch the blue "Done" button in the upper-right corner.