Where can I find the chart for AP spine and femoral neck t-scores?

I had a bone density test done and it tells me that the average total bone mineral density in the AP spine from L1 to L4 is o.683 gm/cm/sq and the bone mineral density of the left femoral neck is 0.573 gm/cm/sq. Then it gives me my t-score. I would like to understand my score better. (Is my osteoporosis considered mild or severe osteoporosis?

Any help will be appreciated.

Thanks in advance.

Does the chart on this page help --

Bone Mass Measurement: What the Numbers Mean (http://www.niams.nih.gov/health_info/bone/bone_health/bone_mass_measure.asp#b)