Product Type	Middle School Grade Level, % (95% Confidence Interval)			High School Grade Level, % (95% Confidence Interval)
	6	7	8	9	10	11	12
Electronic cigarettes	0.7 (0.1–1.3)	3.0 (1.3–4.8)	3.2 (1.4–4.9)	6.2 (2.3–10.2)	8.1 (4.5–11.7)	12.3 (7.9–16.8)	12.8 (8.5–17.2)
Cigarettes	0.9 (0.3–1.6)	2.7 (1.0–4.3)	2.1 (0.9–3.3)	8.1 (4.1–12.0)	5.5 (2.2–8.7)	15.5 (10.3–20.6)	15.4 (10.5–20.3)
Cigars	0.1 (0.0–0.3)	0.7 (0.3–1.1)	1.7 (0.7–2.8)	5.2 (3.2–7.1)	6.5 (3.8–9.1)	10.6 (7.2–14.0)	14.6 (9.7–19.5)
Hookah	0	0.8 (0.1–1.6)	1.8 (0.7–2.9)	3.7 (1.6–5.8)	3.8 (1.4–6.2)	5.9 (2.9–9.0)	6.9 (3.5–10.4)
Smokeless tobacco	0.1 (0.0–0.3)	1.8 (0.4–3.1)	1.7 (0.6–2.8)	7.0 (3.3–10.7)	5.6 (3.1–8.2)	8.3 (5.9–10.7)	10.6 (5.9–15.3)
Pipe tobacco	0.5 (0.0–0.9)	1.5 (0.2–2.8)	1.9 (0.9–2.8)	3.1 (1.5–4.7)	3.1 (1.1–5.1)	5.6 (2.2–9.0)	2.8 (0.6–5.0)
Bidis/kreteks	0.2 (0.0–0.5)	0.6 (0.2–1.1)	0.3 (0.0–0.7)	1.1 (0.1–2.1)	0.8 (0.0–1.8)	1.8 (0.7–2.9)	1.7 (0.5–2.9)
Other	0	0.6 (0.0–1.3)	0.5 (0.0–0.9)	0.8 (0.1–1.6)	1.1 (0.1–2.1)	2.5 (1.2–3.8)	2.8 (1.3–4.3)