Any source for IPv4 statistics on home/personal use vs. business use of addresses?

I've been searching the web for a while and can't come up with any quality source for a breakdown of how IPv4 addresses are allocated (broadly). I know a portion of them are reserved (RFC-1918, RFC-3927, RFC-3330/5737/TEST-NET-[1-3], RFC-5735, and 0.0.0.0/8), some are allocated to businesses, and some are allocated to individuals or home use.

Is there a good source for getting a rough estimate of how the IPv4 address-space falls into each of those buckets?

Thanks!

(cross-posted from /r/Network as recommended there)