CPU Mining is not powerful to begin with, and even the latest mid range processors seem to get around 40kh/s. I have tried mining with my I7 and E3 Processors and can only get a max of 45-50kh/s and generally its closer to 32-35kh/s.
The ones I mentioned are new processors with 4 cores and Virtual Threading. You are using a CPU released over a decade ago boasting low clock speeds and only 1 core. I really doubt you are going to get over 1kh/s from that ever.
The statistics on CPU's are far less than GPU's, but you can use the following website to get an idea of what processors others use as well as the kh/s they obtained.
https://litecoin.info/Mining_hardware_comparison#AMD