The fine print on SteemDB:

"* All Steem Power & VEST calculations are done using the current conversion rate, not a historical rate. This may cause some calculations to be incorrect."

This is useless to just copy the table when it doesn't provide you with any historical rates. Where would those rates even be pulled from? Poloniex? Coinmarketcap?

In any case, we need the historical rates. This process needs to be automated. Also there probably aren't enough accountants for everyone on Steem to call.