the densest air force

How many fighter aircraft is needed to protect your national territory?
Divide the area of a country by its number of fighting aircraft. You get how many km2 per fighter aircraft.

Australia has approx. 1 fighting acft per 48000km2
Turkey 1″ 2550 km2
Germany 1 ” 1238 km2
Denmark 1 ” 695 km2
Greece 1 ” 448 km2
Switzerland 1 ” 344 km2
Israel 1 fighter per 72 km2

Singapore beats them all with 1 fighting acft per 4,4 km2
some off course have none:
New Zealand

maybe it is irrelevant, but nevertheless interesting
who is highest and who is lowest