Didn't skew anything. Established a 30 year time frame and spreadsheeted the facts for that period. If you go very far back past 1980 lots of todays schools did not exist--especially the big schools. Lawrence FS in 1995, how many BV schools existed prior to 1980--perhaps only Blue Valley Stillwell. How many SM, how many Olathe, how many private HS built in the last 30 years. How many high schools have gone either up or down in clasification, what sports, especially girls, have been added in the last 30 years.
As I just replied to Cokely, I think my spreadsheet has utility as an indicator. And, if you want to extend it, send me a PM with your email address I will reply with the spreadsheet as an attachment.