Table A1

The characteristics of sample

VariableFrequency (n)Percentage (%)
Gender
Male12953.1
Female11446.9
Age
17–19 years4317.7
20–29 years9338.3
30–39 years6125.1
40–49 years3614.8
Over 50 years104.1
Education
Less than a high school diploma2711.1
Associate’s degree7028.8
Bachelor’s degree12852.7
Graduate degree187.4
Occupation
Full-time employees11647.7
Part-time employees10.4
Retired31.2
Self-employed197.8
Student7932.5
Others2510.3

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