Year	Average of all stations	At 10 % of the stations a lower AOT40 is measured	At 90 % of the stations a lower AOT40 is measured	5-year average	Target value	Long term objective (LTO)
1996	15209	8080	23884		18000	6000
1997	14494	6295	24070		18000	6000
1998	15727	4689	27164		18000	6000
1999	17618	7577	26798		18000	6000
2000	16429	5372	29425	15895	18000	6000
2001	18815	7078	31299	16617	18000	6000
2002	16484	5574	28800	17015	18000	6000
2003	23335	7980	37948	18536	18000	6000
2004	13631	4621	25378	17739	18000	6000
2005	17198	4971	28585	17893	18000	6000
2006	26053	12896	37929	19340	18000	6000
2007	13797	3992	25328	18803	18000	6000
2008	16325	7454	25519	17400	18000	6000
2009	11217	3980	19653	16918	18000	6000
2010	15353	5043	24428	16549	18000	6000
2011	13232	4244	21229	13985	18000	6000
2012	12936	4210	23278	13813	18000	6000
2013	12976	3958	21927	13143	18000	6000
2014	13196	4098	21233	13539	18000	6000