Changed percentages.
18th - 26%
17th - 20%
16th - 15%
15th - 11%
14th - 8%
13th - 6%
12th - 5%
11th - 4%
10th - 3%
9th - 2%
8th through 1st - 0%
Each of these odds will be times by 100 and done in a random number generator (random.org) from 1 - 10000. So therefore the 18th place team will have numbers from 1 - 2600 and 17th place will have from 2601 to 4600, and so on until the 9th place team which has numbers 9801-10000.