Rwanda - D

Debt/GDP = 0,23 (23%)
Accumulated deficit for last 5 years/budget income for last 5 years = 0,0438
Years since last default = 17 (1995)
5-year inflation = 0,40 (40%)
Budget expences/GDP = 0,28
Trade deficit/GDP = 0,169
World GDP per capita/Country GDP per capita = 15,19
Political factor = 0,3
Crisis factor = 0,5 (a sleeping civil war) 
Other unique factors = 2 (generally too unstable and risky, genocide happened in 1994)

OVERALL CREDIT SCORE: 0,328 (32,8%). This responds to D.

Calculated with this (new) formula:

r = 10/{[1+(debt/GDP)] + [1+10*(accumulated deficit for last 5 years/budget income for last 5 years)] + [1 + (10/years since last default)] + [1+3*(accumulated of last 5 years inflation)] + [1+(budget expences/GDP)] + [1+ 10* (trade deficit/GDP)] + [world's GDP per capita/country's GDP per capita] + [1+political factor] + [1+crisis factor] + [Other unique factors]}
 

Interesting sites: Добри Божилов