预测/估算R中Poisson GLM回归的缺失值？

I'm trying to explore ways of imputing missing values in a data set. My dataset contains the number of counts of an occurance (Unnatural, Natural and the sum Total) for Year(2001-2009), Month(1-12), Gender(M/F) and AgeGroup(4 groups).I'm trying to explore ways of imputing missing