Pete,
The odds are based on the 2005 draw results- not what the results from 2006 will be.
In 2005 there were five residential applicants with 10 points. They each received a tag. The remaining 5 residential tags were split among all the other applicants. 12 people applied with 9 bonus points, so if those same people apply next year with 10 points each your odds would be 5 out of 12, or just about 42%.
Bonus permits are awarded based on the number of bonus points applicants have in descending order- whoever has the most points get the tags first. So if there are more than 6 people that have more points than you for the San Juan hunt then you have 0% chance of getting a bonus tag next year. However, the total number of tags available is split. Half the tags are awarded based on bonus points. The other half are put into a drawing that all applicants have a chance in. Each applicant is given a certain number of entries in that drawing based on the number of bonus points they have. So if you have 9 bonus points, you get 9 entries, plus one for the current years application, giving you 10 total entries in the drawing. So if you multiply out all the applicants that didn't get a bonus permit times the number of bonus points they have plus one, and add them all together, that gives you the total number of entries in the regular drawing. For the San Juan Archery last year the total number of entries was 1022 and you had 10 entries. 10/1022 = 102.2. Your odds were 1 in 102.2.
I wouldn't base my complete decision on the odds from previous years- but it does make for some interesting analysis. There might be some areas you could draw out for for sure. That site can help you recognize them.