Year Average of all stations N At 10% of the stations a lower AOT40 is measured Average of all stations At 90% of the stations a lower AOT40 is measured At 10% of the stations a lower AOT40 is measured p90* 5-year average p90v high Target value Long term objective (LTO) low 5-year average Target value Long term objective (LTO)
1996 15429 7810 24161 16351 18000 6000
1997 14503 5683 24092 18409 18000 6000
1998 15790 4678 27252 22574 18000 6000
1999 17638 7672 26800 19128 18000 6000
2000 16478 5376 29606 24230 15968 18000 6000
2001 18649 6595 31256 24661 16612 18000 6000
2002 16543 5342 28848 23506 17020 18000 6000
2003 23505 8209 39028 30819 18563 18000 6000
2004 13484 4573 24767 20195 17732 18000 6000
2005 17207 4932 28794 23862 17878 18000 6000
2006 26185 13101 37910 24809 19385 18000 6000
2007 13857 4121 25374 21253 18848 18000 6000
2008 16322 7591 25094 17503 17411 18000 6000
2009 10992 3839 19600 15760 16912 18000 6000
2010 15460 5170 24564 19394 16563 18000 6000
2011 13188 4203 21134 16931 13964 18000 6000
2012 12942 4300 23250 18950 13781 18000 6000