21.   Eighteen percent of the women surveyed said that the purpose of contraceptives was to avoid pregnancy.

v. + pregnancy >>共 132
prevent 15.89%
terminate 12.88%
end 10.37%
avoid 3.51%
reduce 2.84%
have 2.84%
hide 2.51%
abort 2.17%
announce 2.01%
carry 2.01%
avoid + n. >>共 1364
problem 2.23%
confrontation 1.84%
conflict 1.24%
tax 1.18%
detection 1.11%
injury 0.98%
risk 0.91%
contact 0.90%
arrest 0.86%
trouble 0.84%
pregnancy 0.12%
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