Year PM2.5 PM10 O3 NO2
2000 86.3 93.2 20.9
2001 85.1 96.3 18.1
2002 82.0 97.1 20.5
2003 91.9 97.8 27.1
2004 80.0 99.0 19.8
2005 83.4 96.5 20.4
2006 97.8 87.0 98.6 17.9
2007 92.7 85.2 97.8 19.4
2008 86.9 73.0 98.6 11.7
2009 91.0 75.9 97.2 14.7
2010 91.4 77.5 95.0 13.1
2011 93.1 83.3 97.1 11.8
2012 91.8 63.6 97.8 8.0
2013 87.1 60.9 97.6 9.0