Of course, number of app created is not the best way to indicate performance. More does not mean better. Yet, I think it is interesting indicator.
Here is a raw data:
country,appcreatorscount,appcount,appspercreator
Australia,76,776,10.2105263157894737
Estonia,18,87,4.8333333333333333
Poland,58,273,4.7068965517241379
Turkey,15,66,4.4000000000000000
China,15,64,4.2666666666666667
Netherlands,25,105,4.2000000000000000
Spain,22,89,4.0454545454545455
Switzerland,26,105,4.0384615384615385
Ukraine,31,124,4.0000000000000000
Bulgaria,12,48,4.0000000000000000
Germany,194,758,3.9072164948453608
Hungary,15,53,3.5333333333333333
India,43,142,3.3023255813953488
Belgium,20,59,2.9500000000000000
United Kingdom,86,227,2.6395348837209302
United States of America,524,1318,2.5152671755725191
Sweden,21,51,2.4285714285714286
Israel,25,60,2.4000000000000000
France,43,103,2.3953488372093023
Canada,48,109,2.2708333333333333
Czech Republic,25,55,2.2000000000000000