TABLE 2

Characteristics of air pollutant concentration (1988–2016)

SPM mg·m−3NO ppbNO2 ppbSmoking rate %
Median0.0330.0230.02630.9
Min0.0200.0070.01519.3
Max0.0430.0370.03036.9

SPM: suspended particulate matter; NO: nitrogen monoxide; NO2: nitrogen dioxide.