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. 1999 Jul 10;319(7202):91. doi: 10.1136/bmj.319.7202.91

Table.

Knowledgeanduse of emergency contraception by age. Values are numbers (percentages)

Age (years)
14 15 17 All
Use of emergency contraception:
 Ever used 173 (2.1) 509 (6.3) 729 (15.1) 1 411 (6.6)
 Never used 7875 (93.6) 7365 (91.5) 4039 (83.5) 19 279 (90.5)
 Don’t know what it is 368 (4.3) 177 (2.2)  72 (1.4) 617 (2.9)
 Total 8416 8051 4840 21 307
Number of uses among ever users (distribution):
 Once 61.8 62.9 66.4 64.6
 Twice 16.2 16.7 17.6 17.1
 Three or more  6.4  4.3  4.9  4.9
 Missing 15.6 16.1 11.1 13.5