City	Annual Average Ambient Air Quality Index (AQI)
City	2015	2016	2017	2018
Wuhan	103.42	92.50	89.33	82.42
Huangshi	93.83	85.00	82.58	76.83
Shiyan	79.00	77.92	73.58	74.33
Yichang	98.00	91.75	90.42	83.42
Xiangyang	111.08	101.33	100.92	94.08
Ezhou	100.67	93.17	84.17	79.75
Jingmen	101.50	87.92	83.08	89.17
Xiaogan	100.42	80.42	83.92	80.83
Jingzhou	101.83	92.92	86.33	81.00
Huanggang	89.83	83.75	84.92	81.17
Xianning	87.17	79.17	78.83	71.58
Suizhou	96.25	87.58	76.92	79.08
Average	96.92	87.79	84.58	81.14