I would suggest (since XRP, MSC et. al. would fall in this category) to split the display in 2 categories:
(Currently) inflating float coins
and
(Currently) stable/falling float coins
Inflating would mean that there are still coins created out of thin air (aka. coinbase transactions) and within a certain period of time there will be MORE units of this coin available for transfer than before.
Stable/deflating means that all planned coins have been issued and it is not planned or possible to create more. These coins need to be issued in a way, that they could at least theoretically be spent, e.g. issuing 21 million BTC to a black hole address and then pulling them with a special transaction from there instead of "coinbase" would NOT make it stable float, issuing 100 billion XRP to OpenCoin/RippleLabs and them promising to distribute 55 billion over time does make them stable float, even if not all have been distributed (because they could theoretically enter the market at any time).
This would mean that some coins will "change sides" over time (e.g. Bitcoin will become stable float somewhere around 2140, Protoshares as far as I understood it much earlier) while others are designed to inflate infinitely.
The reason for this is, as others put it so "elegantly" as "scamcoins", that it might be hard to compare market caps of something that is slowly increasing and a lot of activity that goes down once the amout of units expands with something that enters as a huge amount which is not or slowly decreasing with activity rising over time while adoption grows. IMHO "mining" does not really play a role in distinguishing these 2 types and it seems you mean "it is possible to create new units of these coins by mining" anyways with "mineable".
As a second remark:
I'd like to see sources added for the volume and price of the individual coins, especially BTC, maybe also XRP (since it seems to me you use the number from bitcoincharts.com which reflects only a single market: XRP/BTC.Bitstamp).
Also I'd like to hear your stance on what is considered a "market" that you would add as data source - after all it would be trivial to set up a web page, deposit BTC and XXX, trade these back and forth and create huge wolumes out of nowhere. Which criteria need to be met and how do you deal for example with the fact that BTC are also sold for EUR - do you ignore this, convert EUR to USD or do something else?
Final remark to the new influx of daily trolls:
https://bitcointalksearch.org/topic/poll-should-coinmarketcapcom-re-list-ripple-381016I doubt RippleLabs paid anything ("Ripple" itself is not an entity, it is software), just like the Bitcoin Foundation did not pay to have BTC listed.