Why are my experiences still contradicting the statistics when they apply to wealthy people?

So I've asked many times why most people I encounter or look had a Bachelor's Degree by the time they were 23, despite these statistics.

http://www.nytimes.com/2014/12/02/education/most-c...-4-years-study-finds.html?_r=0

http://www.politifact.com/wisconsin/statements/201...e-takes-six-years-us-sen-ron-/

http://business.time.com/2013/01/10/the-myth-of-the-4-year-college-degree/

https://nces.ed.gov/programs/digest/d13/tables/dt13_326.10.asp

https://nces.ed.gov/programs/digest/d13/tables/dt13_104.20.asp

No matter who I looked up on facebook, no matter who I randomly surveyed out on the streets, it was very rare to come across someone who didn't have a Bachelor's Degree by 23, or wasn't in the process of doing so. This morning I came across this statistic:

http://www.usnews.com/opinion/articles/2011/02/16/...arn-a-college-degree-by-age-23

According to this statistic, only 1/4 of women and 1/7 of men earned a Bachelor's Degree by the time they were 23. Now, I was told several times that the reason I wasn't getting the results reflected by the statistics was because I was only surveying people in wealthy-white areas. Another thing this statistic says is that only 22.4% of white people had earned a Bachelor's Degree by 23. Also, in the 2nd-bottom statistic I provided above, only 42.6% of white people graduated in 4 years, and in the bottom statistic, only 40% of white people between ages 25 and 29 had a Bachelor's Degree. So even among wealthy-white people, most of them still shouldn't have had a Bachelor's Degree by 23. So what's the explanation now?
[Report Post]