Year	N	Average of all stations	At 10% of the stations a lower AOT40 is measured	At 90% of the stations a lower AOT40 is measured	p90v	high	low	5-year average	Target value	Long term objective (LTO)
1996	146	15114	7342	24038	16697	8924	7773		18000	6000
1997	182	14258	4902	24064	19162	9806	9356		18000	6000
1998	194	15320	4296	27024	22728	11704	11025		18000	6000
1999	243	17122	7443	26767	19324	9645	9679		18000	6000
2000	257	16158	5089	29625	24535	13467	11068	15594	18000	6000
2001	259	18330	5985	31170	25185	12840	12346	16238	18000	6000
2002	257	16349	4368	29028	24660	12679	11982	16656	18000	6000
2003	254	23136	7277	38325	31048	15188	15860	18219	18000	6000
2004	255	13278	4368	24485	20117	11207	8910	17450	18000	6000
2005	261	17000	4782	28481	23699	11481	12218	17619	18000	6000
2006	264	25739	12559	37484	24925	11745	13180	19101	18000	6000
2007	263	13634	3591	25268	21677	11634	10043	18558	18000	6000
2008	261	16036	6627	25033	18406	8997	9409	17137	18000	6000
2009	256	10821	3126	19519	16393	8698	7695	16646	18000	6000
2010	251	15393	4888	24506	19618	9113	10505	16325	18000	6000
2011	250	13092	4142	21000	16857	7908	8949	13795	18000	6000