If you complete phone screens on 1 out of every 10 inquiries you send, you are doing very well in my opinion.
If those phone screens do not turn into full interviews or offers, that is a statement on how they went, not on company responsiveness.
Frankly, I don't think your stats show a lack of response at all. I think they are very reasonable, as some level of non-responsiveness is natural, when you account for the fact that you gave them enough information to summarily dismiss you from consideration if you don't match their needs or culture.
If those phone screens do not turn into full interviews or offers, that is a statement on how they went, not on company responsiveness.
Frankly, I don't think your stats show a lack of response at all. I think they are very reasonable, as some level of non-responsiveness is natural, when you account for the fact that you gave them enough information to summarily dismiss you from consideration if you don't match their needs or culture.