I am too lazy to do this, but a much better comparison is to compare the hash rates of all the coins together. (remember to divide by 1000 to compare SHA and Scrypt rates)
Also for a bonus cookie compare the increase in alt coin hash rate the the hash rate of Bitcoin and see if there is evidence of people moving away from Bitcoin.
Hash rates are largely irrelevant because each coin eventually changes it's difficulty to maintain a constant creation rate regardless of the hash rate.
I think you misunderstand why I am using the network hash rate as a metric.
I'm not talking about hash rates because of the amount of coins, but rather hash rates as a metric for user interest. If Feathercoin is at 10% of Litecoins hashing power, that means Feathercoin is being trusted more and more. Remember crypto-currencies are network effect based value systems with no "metal" or "government trust" to fall back on. So more people using a coin will give that coin more value.
In this regard network hash rate is very important. If Litecoin was at the same hashrate as Bitcoin (after doing the divide by 1000 conversion) then we would expect Litecoins to much more valuable.
So if someone wants to gauge the "network effect" of each coin, start comparing network hash rates.
As a stupid guess I would expect the following:
Litecoin to be 3-10% of Bitcoins total network hash rate.
Feathercoin to be 5 % of Litecoins hash rate.
These are just my guesses, I would like someone to tell me how wrong they are!
