Table 1.

The list of keywords used for retrieving the internet search queries.

Category	Keywords
(1) Healthy environment	(6) Days with good air quality, (7) days with heave air pollution, (8) drinking water quality, (9) green space per capita, (10) harmless disposal of garbage, (11) harmless toilet, (12) public toilet, (13) safety of drinking water sources, (14) sports ground per capita
(2) Healthy society	(15) Beds in senior care facilities, (16) food safety, (17) food sampling inspection, (18) healthy communities, (19) healthy enterprises, (20) health expenditure, (21) healthy schools, (22) occupational health exam, (23) occupational safety, (24) senior care service, (25) social sports instructor
(3) Health service	(26) Basic health insurance reimbursement, (27) children health management; (28) general practitioners, (29) health archive, (30) hospital beds, (31) incidence of malign tumors, (32) maternal and child health management, (33) maternal health management, (34) mental disorder patient management, (35) mental health management, (36) public health workers, (37) the standard of national physique examination,
(4) Healthy population	(38) Disease vector control, (39) health status, (40) incidence of infectious diseases, (41) infant mortality, (42) life expectancy, (43) maternal mortality rate, (44) mortality of children under five, (45) neonatal death, (46) prevalence of high blood pressure, (47) road traffic accident injuries, (48) student fitness
(5) Health literacy	(49) Fitness activity, (50) health education, (51) participation in exercise, (52) smoking rate
Others	(53) Health baseline investigation, (54) health behavior, (55) health equity, (56) health impact assessment, (57) health industry, (58) healthy city, (59) healthy township, (60) pro-health attitude