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PTS-2017 - Release: 2017-10-11 
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+ added PTS_A, PTS_H, and PTS_S scores for 2016
+ added variable NA_Status_A, NA_Status_H, and NA_Status_S to characterize NAs
+ added PTS-Codebook (Version 1.00)

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PTS-2016 - Release: 2016-09-09 
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+ renamed variables PTS-a, PTS-h, and PTS-s to PTS_A, PTS_H, and PTS_S
+ added PTS_A, PTS_H, and PTS_S scores for 2015
+ added a new Country variable (changing country names to official names)
+ renamed old Country variable to Country_OLD
+ added entries for observations with missing reports and/or scores
+ revised, updated, and added identifiers and country codes:
	COW_Code_A
	COW_Code_N
	WorldBank_Code_A
	UN_Code_N
	Region
+ removed old identifiers and country codes
+ transitioned to the report-year format for the Excel release
+ added data archive