National Trends in PM10 Concentrations in 2000 - 2012
Year Mean Number of Trend Sites 10th Percentile 90th Percentile
2000 87.3346379647749 511 38 123
2001 95.518590998043 511 38 116
2002 87.0841487279843 511 37 123
2003 93.2279843444227 511 35 135
2004 76.0831702544031 511 34 106
2005 73.206457925636 511 35 105
2006 79.9021526418786 511 35 115
2007 68.1128506196999 511 36 112
2008 67.0397912589693 511 34 107
2009 57.750815394651 511 29 93
2010 60.1141552511415 511 31 90
2011 63.8023483365949 511 30 95
2012 63.7651663405088 511 28 114