Interesting that you are declaring (although I note the "apparently" qualifier), as I have heard, that Australia IS the biggest per capita producer of CO2. How does this stack up against the Wikipedia list quoted earlier? Is the Wikipedia article to be trusted? Are your sources also my sources about Australia's position? So who is providing the information of quality?
Clearly Australia is not the absolute largest per capita producer of CO2 as the link shows, but it's hardly in a position to be crowing about.
When the higher per-capita producers are places where essentially no-one lives (Falkland Islands & Netherland Antilles anyone?), some alarm bells should be going off as to the use of that list other than in absolutist terms.
I'm not reading much from Australia these days, but the claim that I'm familiar with is that of the top 20 CO2 producers (e.g. those that you might actually care about from a global standpoint, which excludes basically everyone above Oz in the wiki list) Australia *is* the highest per capita (here's data from 2011, http://www.ucsusa.org/global_warming/science_and_impacts/science/each-countrys-share-of-co2.html#.V0pFBuTp-iI
). The conditional of 'of the top producers' might be betting dropped which is lazy but doesn't change the basic point.
I can't be bothered adding up the actual production of everyone above Australia on the linked wiki list, but I wouldn't be surprised if it's pretty insignificant.
Now the US isn't far behind Australia in that 2011 emissions data, but it accounts for some 16% of global economic output (which is pretty close to it's % of global emissions). China's % of global GDP is actually a multiple of its % of global emissions (16% to 6-7%). Australia on the other hand contributes about 1% to global GDP for it's 18% of global emissions which appears problematic, to say the least. Again I didn't do the math, but eyeballing those two charts doesn't have anyone else even coming close by that ratio.
So while Australia isn't, literally, the leading CO2 producer per capita, I don't know why I'd bother quibbling over that compared the other metrics I've listed above.