Linux sizes

Ok, lets get some conclusions about the image:

1. Time is 9 years, Linux had almost 9 years old in 1999.
2. I don't now the numerical values of the samples.
3. In 1999, the average is in medium size (M), in 2008 is extra large (XL).
4. I think one explanation, many linux users started as very active-skinny young people and later they gain some weight.
5. But really few people, like me, use Linux in 1999, and after the Ubuntu boom in 2005 many new users are converted every year. Are they bigger in size?
   
6. The anti-MS commentary: If Windows crash every 5 minutes, the BSOD makes you move with your frustration, Linux stability makes you be more static in front the screen.

BTW, I'm L since 1995.