The paper sets out two adjustments for taxation data when income distribution is relevant. The adjustments are used on income series for primary producers and wholesale-retail trading and results compared. Little difference is found between the two income series though the latter, years show the wholesale-retail traders series continuing on an upward trend, while the primary producers series appears to climb at a slower rate or has flattened out. An examination of income led to similar conclusions though these figures seem to imply that in both industries there is a hard core of poverty, individuals who can neither raise their income nor move out of the industry.