I guess that means you want to deduct all the unspent coinbase rewards since 2009. I don't think there's any tool or website for that, you'll have to write the code yourself.

There's no essential information you can extract from that statistic, however. We frequently notice coins mined in 2010 being spent more than decade later. Lost coins are only the provably lost, which amount to less than 5 thousand. All the rest are just speculation.