0-6 000 µg/m³.h
<1996>1541996>
<1997>1981997>
<1998>3081998>
<1999>901999>
<2000>3272000>
<2001>2152001>
<2002>2152002>
<2003>1732003>
<2004>4132004>
<2005>2582005>
<2006>492006>
<2007>4842007>
<2008>972008>
<2009>4112009>
<2010>3162010>
<2011>2602011>
<2012>2932012>
<2013>4082013>
<2014>3112014>
<2015>4302015>
6 000-12 000 µg/m³.h
<1996>5181996>
<1997>6001997>
<1998>3241998>
<1999>3471999>
<2000>5052000>
<2001>4772001>
<2002>4872002>
<2003>2762003>
<2004>4832004>
<2005>3362005>
<2006>1452006>
<2007>5172007>
<2008>5802008>
<2009>6892009>
<2010>5922010>
<2011>5522011>
<2012>6682012>
<2013>7552013>
<2014>7452014>
<2015>5082015>
12 000-18 000 µg/m³.h
<1996>4681996>
<1997>6211997>
<1998>5561998>
<1999>8151999>
<2000>4052000>
<2001>4192001>
<2002>4492002>
<2003>2562003>
<2004>4342004>
<2005>5112005>
<2006>4382006>
<2007>3832007>
<2008>6482008>
<2009>4942009>
<2010>7102010>
<2011>8742011>
<2012>5422012>
<2013>4722013>
<2014>6342014>
<2015>4822015>
> 18 000 µg/m³.h
<1996>8831996>
<1997>6051997>
<1998>8361998>
<1999>7721999>
<2000>7882000>
<2001>9132001>
<2002>8732002>
<2003>13192003>
<2004>6942004>
<2005>9192005>
<2006>13912006>
<2007>6582007>
<2008>7272008>
<2009>4572009>
<2010>4352010>
<2011>3762011>
<2012>5602012>
<2013>4272013>
<2014>3722014>
<2015>6142015>
Covered area
<1996>20241996>
<1997>20241997>
<1998>20241998>
<1999>20241999>
<2000>20242000>
<2001>20242001>
<2002>20242002>
<2003>20242003>
<2004>20242004>
<2005>20242005>
<2006>20242006>
<2007>20422007>
<2008>20522008>
<2009>20522009>
<2010>20542010>
<2011>20632011>
<2012>20632012>
<2013>20632013>
<2014>20632014>
<2015>20342015>