Year	Average	10th percentile	90th percentile	limit value	Limit value
2000	29.4	17.6	41.3		40.0
2001	28.7	17.6	40.9		40.0
2002	28.0	16.9	41.2		40.0
2003	30.5	18.1	43.5		40.0
2004	28.0	16.7	41.2		40.0
2005	27.8	16.0	40.7		40.0
2006	27.7	16.5	39.6		40.0
2007	26.5	14.8	38.7		40.0
2008	25.2	14.3	36.3		40.0
2009	25.3	14.4	36.9		40.0
2010	25.6	15.2	36.4		40.0
2011	24.7	14.4	35.9		40.0
2012	23.6	14.1	34.0		40.0
2013	23.2	13.6	34.2		40.0
2014	22.1	12.8	32.5		40.0
2015	22.9	12.8	34.4		40.0