Table 1. Characteristics of Questionnaire Respondents (n = 2799).

Variable	n	%
Sex
​ Female	1580	56.4
​ Male	1219	43.6
Age (yrs)
​ 18–30	613	21.9
​ 31–40	881	31.5
​ 41–50	834	29.8
​ 51–60	471	16.8
Highest level of education
​ Compulsory education (through grade 9)	192	6.9
​ High school graduation	831	29.7
​ University/college degree	1776	63.4
Occupation
​ White-collar worker	1497	53.5
​ Blue-collar worker	507	18.1
​ College student	345	12.3
​ Other	450	16.1