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Age (years)	Right-handed	Left-handed	Ambidextrous
Girls
	seconds
7 and younger	0.53	0.60	0.65
8	0.52	0.57	0.46
9	0.61	0.59	0.51
10	0.54	0.56	0.53
11	0.52	0.56	0.49
12	0.49	0.51	0.48
13	0.48	0.49	0.44
14	0.46	0.44	0.45
15	0.48	0.53	0.45
16	0.47	0.47	0.48
17	0.45	0.48	0.48
18	0.45	0.45	0.47
19	0.49	0.57	0.40
20 and older	0.53	0.73	0.47
Source: Statistics Canada, Census at School, 2007/2008.

Age (years)	Right-handed	Left-handed	Ambidextrous
Boys
	seconds
7 and younger	0.50	0.57	0.60
8	0.48	0.50	0.40
9	0.52	0.51	0.46
10	0.49	0.49	0.48
11	0.48	0.48	0.49
12	0.44	0.45	0.43
13	0.42	0.45	0.43
14	0.41	0.42	0.41
15	0.42	0.43	0.42
16	0.42	0.49	0.45
17	0.40	0.40	0.38
18	0.41	0.37	0.42
19	0.45	0.33	0.32
20 and older	0.49	0.47	0.95
Source: Statistics Canada, Census at School, 2007/2008.

Age (years)	Girls	Boys	All students
By age
	seconds
8	0.52	0.48	0.50
9	0.60	0.51	0.56
10	0.54	0.49	0.52
11	0.52	0.48	0.50
12	0.49	0.44	0.47
13	0.47	0.43	0.45
14	0.46	0.41	0.43
15	0.48	0.42	0.45
16	0.47	0.43	0.45
17	0.45	0.40	0.43
18	0.45	0.40	0.42
19	0.49	0.43	0.45
Source: Statistics Canada, Census at School, 2007/2008.