I want to know the answer to the following question:
As of 3/3/2016, how many active aircraft carriers are there worldwide?
All the background I'm provided with is that "As well as the supercarrier fleet, the US Navy has nine amphibious assault ships used primarily for helicopters (sometimes called helicopter carriers); these can also carry up to 25 fighter jets, and in some cases, are as large as some other nations' fixed-wing carriers.". Is that enough to answer the question?