Of little import

To do any kind of analysis on a series of small dependencies that nobody expected to be hives of commerce, one could look at the few places that don't appear on both lists. Tonga is the largest 'under ten million dollars in exports' economy so where does it place in terms of imports? Using the same chart - you'll see why in a minute - 'not that far ahead', being just outside the list along with Palau and the Federated States of Micronesia, and exports to the value of $139,000,000.
Norfolk Island, meanwhile, can't be much of an exporter as it doesn't appear on the list at all.

As far as choosing your lists goes, the hyperlink to Nauru as an exporter shows the World Trade Organisation (or at least an old chart of theirs used in Wikipedia) to be quite at odds with the OEC
Nauru is the 198th largest export economy in the world. In 2013, Nauru exported $57.4M and imported $126M, resulting in a negative trade balance of $69.6M.

Neither of these organisations are paid to guess; they are heavily invested in the material they deal with.

How does an economy with six hundred and forty bucks GDP per capita fare? $138,900,000 in exports and $237,300,000 in imports for the Central African Republic.

Tiny Tuvalu without a GDP to its name is already on the list while Djibouti and Mozambique have, respectively, $90,800,000 exports/$644,000,000 imports and $3,920,000,000 exports/$3,520,000,000 imports

It's pick on Venezuela week so lets reveal (through 2012 estimates!) that they have $83,200,000,000 in exports, making them a respectable 43rd on the list of highest exporters. What's more, it's higher than their $59,310,000,000 in imports; this is normally good news. Being the forty eighth biggest importer only serves to place them with the giants or near giants.
I have a feeling that Afghanistan, while well on the road to recovery, can be grouped here rather than with the mature and robust economies: $376,000,000 exports and $6,390,000,000 in imports; this is normally bad news when there is six billion more in import than export.

If high school Economics and Consumer Education failed to fill the gaps in those other categories, don't expect Business Principles and Practice of a similar vintage to do more than conjure the skill of creating a spreadsheet prior to the days of Microsoft Excel. Other than a broad layman observation that the highest and lowest importers and exporters are the same while there's considerable play in the middle, I wouldn't know what to make of this. I'd imagine we'd have to go ages back and find those posts on population sizes since importing is based on demand. Exporting is more related to the kind of foodstuff and such that are naturally found in a country, or can be easily grown or farmed there.