I exaggerate very slightly; a slight majority of all new wealth is in the hands of the top 1% of the population. The top 0.1% probably only has about half of that, so a quarter of the newly created wealth. Anyway, the details vary slightly from source to source because it depends on whether you are talking net wealth, financial wealth, income, etc. etc. Also it depends on who you lump together, which is a judgement call. It gets "worse" the closer you get to Bill.
More information than you probably care to know about the topic can be found here:
http://sociology.ucsc.edu/whorulesamerica/power/wealth.html
Let's look at table 5a. End of 2001, the S&P500 was at 1,148.08. End of 2007, it was at 1,468.36. The S&P 500 isn't a bad proxy for the total value of the entire stock market.
So, quick guestimate, 2001->2007, richest 1% went from 33.5% OF 1,148 to 38.3% of 1,468, that's 385 to 562 -> a gain of 178. That's more than half of the total 320 point gain.
So, counting just the stock market (thus not housing bubbles), roughly 55% of the new wealth created between 2001 and 2007 was in the hands of the top 1% of the population.