Hi Nippy
Your best speaking to the nurses on the Myeloma UK helpline, they are the experts in this sort of thing or your local healthcare team.
They say that myeloma is very individual and I am sure that you can find all sorts of posts on various website with lots of people have different pps at various times. I am not an expert, the numbers can go up and down but what seems to matter most is the overall trend ie how fast it is changing and overall health.
Hope this helps
David