Translating Amazon.com ratings into book sales

For those who track their book sales, this link should be pretty interesting.

Rank . . . . .Copies Sold/day
1 . . . . . . . .3000
10 . . . . . . . 650
100 . . . . . .. 100
1000 . . . . . . 13
10,000 . . . . ..(11 copies every 5 days)
100,000 . . . . .(1 copy every 5 days)
1,000,000 . . . .(3 copies every 500 days)
2,000,000 . . . .(1 copy every 1000 days)