Percentages of demographic variables for each response class.
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Note: N(Explicit withdrawals) = 499. N(Lost Participants) = 1065, N(Intermittent Respondents) = 1733. N(Constant Respondents) = 3088. Respondents could report more than one ethnicity. Percentages of demographic variables for each response class.
创建时间：
2015-03-20
