Online MSc Computer Science Merrimack College

[carrythenothing]

from the article 
"Around half of all software engineers are self-taught, ..."

from his source ... 

Undergraduate Major of Professional Developers  

63.3% - Computer science, computer engineering, or software engineering
 8.3% - Another engineering discipline (ex. civil, electrical, mechanical)
 6.9% - Information systems, information technology, or system administration
 4.3% - A natural science (ex. biology, chemistry, physics)
 4.3% - Web development or web design
 3.9% - Mathematics or statistics
 2.2% - A business discipline (ex. accounting, finance, marketing)
 2.1% - A humanities discipline (ex. literature, history, philosophy)
 1.7% - A social science (ex. anthropology, psychology, political science)
 1.6% - Fine arts or performing arts (ex. graphic design, music, studio art)
 1.1% - I never declared a major
 0.3% - A health science (ex. nursing, pharmacy, radiology)

if you add up the numbers from 
* Computer science, computer engineering, or software engineering
* Information systems, information technology, or system administration
* Web development or web design

you get 74.50% 

i don't get how he gets "Around half of all software engineers are self-taught, ..." when 75% have degrees involving CS or programming  
even if he's going with the strict wording of degree in "software engineers" that's still 63% which is way more than half

To be fair, that 63% to 74.50% is of the people who had an undergraduate major (i.e., it doesn't include people who didn't go to college).