For the spreadsheet heads, I've updated this spreadsheet:
https://spreadsheets.google.com/spreadsheet/ccc?key=0AqVfI8kT3-pLdFc4TEd2dHhXbXRBT2U4bW1kbi02dnc&hl=en_USso that now there is a sheet (sheet2) that lists all the courses, the number of years they have been ranked, their min, max, average, and standard deviation of ranking, and then for each year, their rank.
From this you can derive some fun facts:
184 courses have been deemed Top 100 material over the 15 editions of rankings.
6 courses have never been ranked worse than top 10.
9 additional courses have never been ranked worse than top 20 (and all have been top 10 at some point.
All of the courses that have been top 20 or better have been on the list all 15 years, with the exception of Sand Hills.
Pasatiempo had the most fleeting dance with fame, breaking the top 100 once, at 100, before dropping out again.
Walton Heath Old is the "worst" every list performer, never rising above 76, but never dropping below 92.
Shoal Creek, Firestone South, El Saler, and and Colonial, to a name a few, have not been treated well by time. Firestone, in particular, was never rated hiigher one edition to the next, before being popped off the list.