# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8216              55
         2001      20424             198
         2002      28170             330
         2003      32082             431
         2004      26646             400
         2005      28594             447
         2006      40881             549
         2007      32884             499
         2008      29409             519
         2009      27213             432
         2010      25920             421
         2011      24051             441
         2012      26309             453
         2013      23903             425
         2014      20952             405
         2015      21406             429
         2016      20037             440
         2017      26683             472
         2018      16459             459
         2019      11714             421
         2020       9103             390
         2021       7392             378
         2022       5429             367
         2023       3606             441
         2024       2590             501
         2025       1528             355
        TOTAL     521601           10658