year	average	10th percentile	90th percentile	limit value
2001	28.572513	17.568	39.529	40
2002	27.733904	16.75	40.138	40
2003	30.084697	18.129	42.45	40
2004	27.530409	16.561	39.436	40
2005	27.172694	15.648	40.002	40
2006	26.993807	16.259	37.906	40
2007	25.960862	14.654	37.759	40
2008	25.017022	14.04	35.844	40
2009	25.042855	14.057	36.219	40
2010	25.192913	14.887	35.599	40
2011	24.257836	14.008	35.346	40
2012	23.18835	13.874	33.493	40
2000	29.153338	17.471	40.235	40