Statement:
Sao Tome and Principe has a lower Human Development Index than Bulgaria

In the Human Development Index rating Sao Tome and Principe holds position #137 ²⁰²¹ out of 187 and Bulgaria is #61 out of 187 ²⁰²¹.
Position of Sao Tome and Principe is worse than position of Bulgaria.

Referencies:

1. Human Development Index ²⁰²¹ by United Nations

   The countries in the rating sorted by 'Human Development Index' in descending order.

   Bulgaria	'Human Development Index' value is	0.80
   Sao Tome and Principe	'Human Development Index' value is	0.62