Year	PM2.5	PM10	O3	NO2	BaP	SO2
2000		84.4	93.8	25.9
2001		85.6	96.6	22.3
2002		81.9	96.7	23.1
2003		91.4	95.9	31
2004		77.8	99.2	20.6
2005		82.4	96	21.4
2006	97.3	85.6	99	18.2
2007	90.8	85.8	97.8	20.7
2008	86.7	74.7	98.5	12.3
2009	90.4	75	97.1	14.3
2010	88.1	77.2	95.6	11.7
2011	91.9	85.5	97.2	11.8
2012	90.4	63.7	97.9	8.8
2013	84.9	61.7	98.2	9.0
2014	85	50.2	95.9	7.4
2015	80.3	52.2	95.4	8.4
2016	74	41.9	97.9	7.3