Worldwide Fulltext Usage of Data Astrophysics Data System in 2012

The data contained in these files (one in Excel, the other in JSON format) consists of full text download numbers through the ADS during the year 2012. Every row is a journal, indicated by the journal name and the ADS abbreviation (\"bibstem\", see: http://adsabs.harvard.edu/abs_doc/journals2.html). For each journal, we present the download numbers split up by publication year (with the first data column being the range \"pre 1998\"). Full text downloads within the ADS service are defined as 'clicks' on either of the links within an ADS record that provide access to full text in one form or other. Specifically, these are the 'E', 'F', 'L', 'G' or 'X' links (see http://doc.adsabs.harvard.edu/abs_doc/help_pages/results.html#List_of_Links definitions). The data contained in these files had been released under the CC-BY License (see: http://creativecommons.org/licenses/by/3.0/us/). Please acknowledge the ADS in a publication that makes us of these data by the phrase: ``This research has made use of NASA's Astrophysics Data System.\"