How does your country's flag rate

The world's flags given letter grades - Grades by name of country.

So which are the best:

Gambia: A+ 90/100
Pakistan: A 88 / 100
Japan: A 87 / 100
Somalia: A 86 / 100
Cuba: A 85 / 100
Israel: A 85 / 100
South Africa: A 85 / 100
Switzerland: A 85 / 100
Turkey: A 85 / 100
Viet Nam: A 85 / 100

And the worst:

American Samoa: D- 39 / 100
Belarus: D- 39 / 100
Niue: D- 39 / 100
Falkland Islands: D- 38/100
Mozambique: D- 37 / 100
Turkmenistan: D- 37 / 100
El Salvador: D- 36 / 100
Brazil: D- 35 / 100
Guam: F 20 / 100
U.S. Virgin Islands: F 6 / 100
Northern Mariana Islands: F 2 / 100

Australia gets a C - 55 out of 100.

Mind you these are just someone's opinions.