Given the following passage

"The 2014 Human Development Report by the United Nations Development Program was released on July 24, 2014, and calculates HDI values based on estimates for 2013. Below is the list of the "very high human development" countries:",

answer the following question. Note that the answer is present within the text.

Question: What were the crucial data for the list?
estimates for 2013
The passage mentions a UN report that calculates HDI values, and states that the data used for this was estimates for 2013. Thus, these are the crucial data behind making this list of countries..