Statspack-100% miss - ??

I am trying to get a feel of the statspack report and I have the D.K.Burleson book; there is one section about the dictionary cache statistics in his book where he talks about dc_histogram_defs.

But my questions is for dc_histogram_data_values which shows a miss percentage of 100% What does this indicate?

Get Pct Scan Pct Mod Final
Cache Requests Miss Reqs Miss Reqs Usage
------------------------- ------------ ------ ------- ----- -------- ----------
dc_global_oids 6,224 0.1 0 0 45
dc_histogram_data 92 46.7 0 0 47
dc_histogram_data_values 4 100.0 0 0 4
dc_histogram_defs 52,998 9.6 0 0 13,615

Thanks,
Nizar.