Bad correlation. L/XL(XXL also in many cases) doesn't necessarily mean the person is obese. XL is a common size for people with a moderate to tall height and good shape.
The shift is still there, though. The data missing, though, is the sizes in cm/in. I wouldn't be surprised if M/L/XL changed meaning between those dates.
4 comments
[ 3.2 ms ] story [ 19.1 ms ] thread[1]: https://en.wikipedia.org/wiki/Vanity_sizing