I’d love to know but intuitively i dont agree with Scarlet. When I first came to SD in the mid 80’s I couldnt beleive how little industry there was here not related to the military or tourism. While those are still very large segments of our economy we have grown far beyond that. I beleive it has more to do with a shift from a military/tourisn dominated area (i.e. who are very young) and a shift toward more high tech industries (i.e. young professionals with college and grad degrees). It has also become a much higher profile retirement destination than it was in the past. While SD was well know in other parts of the western US for what it offered, it is only in the last 10 to 20 years that the east coast and much of the world have discovered what a gem SD is.