Q: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
Liberia scored a 3.3 on a scale from 10 (highly clean) to 0 (highly corrupt) on the 2010 Corruption Perceptions Index. This gave it a ranking 87th of 178 countries worldwide and 11th of 47 in Sub-Saharan Africa. This score represented a significant improvement since 2007, when the country scored 2.1 and ranked 150th of 180 countries. When seeking attention of a selection of service[clarification needed] providers, 89% of Liberians had to pay a bribe, the highest national percentage in the world according to the organization's 2010 Global Corruption Barometer.
A:
What was liberia's score on the 2010 Corruption Perceptions index?