 Census officials have identified anomalies within data results resulting from the misclassification of shipments by individual parties and a method initiated by the Census that altered the value of some shipments as it distorted the quantity of imports and exports based on outdated price data.In the early 2000s for example, polished diamonds were mistakenly sorted as “unsorted” rough diamonds.Steps taken to amend data anomalies on behalf of Census include notifying U.S Customs of diamond classification problems and educating diamond importers and exporters of the provisions diamonds must meet under the CDTA and proper way to classify diamonds.