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	15177	8001	23847		18000	6000
1997	14527	6257	24087		18000	6000
1998	15792	4678	27252		18000	6000
1999	17658	7556	26803		18000	6000
2000	16442	5368	29475	15919	18000	6000
2001	18840	6893	31363	16652	18000	6000
2002	16515	5542	28835	17049	18000	6000
2003	23355	7838	37701	18562	18000	6000
2004	13637	4678	25026	17758	18000	6000
2005	17236	4970	28690	17916	18000	6000
2006	26090	13258	37981	19366	18000	6000
2007	13826	3968	25348	18829	18000	6000
2008	16306	7406	25220	17419	18000	6000
2009	11264	3976	19684	16944	18000	6000
2010	15389	5033	24444	16575	18000	6000
2011	13232	4244	21229	14003	18000	6000
2012	12936	4210	23278	13825	18000	6000
2013	12976	3958	21927	13159	18000	6000
2014	13215	4132	21230	13549	18000	6000
2015	15697	2778	25902	13611	18000	6000