Toolbar page rank

Toolbar page rank is calculated using ranges of real page rank. For example, imagine that the maximum Google PR value is 1,000,000. Toolbar PR 1 equals a range of 1 - 10. Toolbar PR 2 equals a range of 10 - 50. Toolbar PR 3 equals a range of 50 to 1000. Toolbar PR 4 equals a range of 1000 - 10,000 and so on, until finally toolbar PR 9 ranges from 600,000 - 1,000,000.