Android : Statistics about Android devices with MIPS processors

I use native libraries in my project. I have build them for ARM, ARMv7 and x86 architectures and just wonder if I should build them for MIPS too? Where can I find any statistical information about what part of Android devices run on MIPS processors. I want to understand if it has a meaning to make my APK larger in 4 - 5 MB because of the MIPS libs.