NOTE: 1) The information regarding Bulgaria on this page is re-published from the 2012 World Fact Book of the United States Central Intelligence Agency. No claims are made regarding the accuracy of Bulgaria Chiefs of State 2012 information contained here. All suggestions for corrections of any errors about Bulgaria Chiefs of State 2012 should be addressed to the CIA.
2) The rank that you see is the CIA reported rank, which may habe the following issues:
a) They assign increasing rank number, alphabetically for countries with the same value of the ranked item, whereas we assign them the same rank.
b) The CIA sometimes assignes counterintuitive ranks. For example, it assigns unemployment rates in increasing order, whereas we rank them in decreasing order