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For example , 29 % of those who had attended more than one field day had also attended more than one conservation tillage conference ; in contrast , 91 % of those who had n't attended a field day had also not attended a winter conference . Over a 3-year period , 345 of the 510 active clients in the intervention program ( 68 % ) attended at least one social event , and 66 % attended more than one . Nutrition camps were attended by about 80 per cent of the mothers ( table 8 ) , and about 74 per cent attended more than once .