Age Group, y	Prevalence	School Year, %					Trend for Time P value
		2006–07	2007–08	2008–09	2009–10	2010–11
Overall (ages 5–14)	Obesity	21.90	21.40	20.90	21.00	20.70	<.001
	Severe obesity	6.30	6.10	5.90	5.80	5.70	<.001
5–6	Obesity	20.20	19.40	18.80	18.40	18.20	<.001
	Severe obesity	4.30	4.20	3.90	3.90	3.70	<.001
7–10	Obesity	22.90	22.70	21.80	22.20	21.80	<.001
	Severe obesity	6.80	6.50	6.20	6.20	6.00	.04
11–14	Obesity	21.80	21.00	21.10	21.10	21.10	<.001
	Severe obesity	7.00	6.60	6.70	6.60	6.50	<.001