Educational level attained	Insufficiency in a given number of concepts	Total
Total	In at least 2 concepts	33.2
Total	In at least 3 concepts	13.9
Total	In at least 4 concepts	4.9
Primary education or lower	In at least 2 concepts	46.5
Primary education or lower	In at least 3 concepts	19.5
Primary education or lower	In at least 4 concepts	6.8
First stage secondary education	In at least 2 concepts	41.8
First stage secondary education	In at least 3 concepts	18.4
First stage secondary education	In at least 4 concepts	6.8
Second stage secondary education	In at least 2 concepts	27.0
Second stage secondary education	In at least 3 concepts	11.4
Second stage secondary education	In at least 4 concepts	3.8
Higher education	In at least 2 concepts	14.4
Higher education	In at least 3 concepts	5.1
Higher education	In at least 4 concepts	1.7
No data recorded	In at least 2 concepts	26.0
No data recorded	In at least 3 concepts	8.6
No data recorded	In at least 4 concepts	8.5